/* U助理 Official Site — Premium Design System */
:root {
  --bg: #06090f;
  --bg-2: #0b111a;
  --bg-3: #121a27;
  --surface: rgba(255, 255, 255, 0.028);
  --surface-hover: rgba(255, 255, 255, 0.055);
  --border: rgba(255, 255, 255, 0.065);
  --border-strong: rgba(255, 255, 255, 0.12);
  --text: #eef1f6;
  --text-secondary: #9ea7b8;
  --text-muted: #6a7386;
  --accent: #b39afa;
  --accent-deep: #8b6fd4;
  --accent-soft: rgba(179, 154, 250, 0.13);
  --accent-glow: rgba(139, 111, 212, 0.26);
  --accent-bright: #d2c4ff;
  --accent-grad: linear-gradient(135deg, #4d6ef0 0%, #7c5cdb 50%, #9b7aef 100%);
  --gold: #dcc08a;
  --gold-soft: rgba(220, 192, 138, 0.09);
  --promo: #5ad6ef;
  --promo-soft: rgba(90, 214, 239, 0.12);
  --promo-deep: #2bb8d6;
  --brand-blue: #315cff;
  --brand-violet: #8b5cf6;
  --brand-cyan: #22e6ff;
  --radius: 16px;
  --radius-sm: 10px;
  --nav-h: 72px;
  --max: 1080px;
  --max-home: 1520px;
  --gutter: 48px;
  --space-section: 96px;
  --space-block: 24px;
  --content-prose: 1080px;
  --font-display: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-brand: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-body: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-card: 0 18px 48px rgba(0, 0, 0, 0.32);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
  max-width: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-weight: 400;
  font-size: 15.5px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overflow-x: clip;
  max-width: 100%;
}

img,
video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background: rgba(182, 124, 255, 0.32);
  color: #fff;
}

.container {
  width: min(100% - (var(--gutter) * 2), var(--max));
  margin-inline: auto;
}

/* ---------- Atmosphere ---------- */
.bg-mesh {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 70% 45% at 8% -5%, rgba(120, 110, 180, 0.06), transparent 55%),
    radial-gradient(ellipse 55% 40% at 92% 8%, rgba(224, 192, 138, 0.05), transparent 50%),
    radial-gradient(ellipse 45% 35% at 50% 110%, rgba(120, 110, 180, 0.035), transparent 55%),
    var(--bg);
}

.bg-noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.bg-orb {
  pointer-events: none;
  position: fixed;
  z-index: -1;
  width: 42vw;
  height: 42vw;
  max-width: 560px;
  max-height: 560px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.22;
  animation: orbFloat 18s ease-in-out infinite;
}

.bg-orb--a {
  top: -8%;
  left: -6%;
  background: radial-gradient(circle, rgba(120, 110, 180, 0.28), transparent 70%);
}

.bg-orb--b {
  right: -8%;
  bottom: 8%;
  background: radial-gradient(circle, rgba(220, 192, 138, 0.18), transparent 70%);
  animation-delay: -7s;
  animation-duration: 22s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(3%, 4%) scale(1.08); }
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent), var(--gold));
  box-shadow: 0 0 12px var(--accent-glow);
  transition: width 0.05s linear;
}

/* ---------- Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(6, 9, 15, 0.8);
  backdrop-filter: blur(20px) saturate(1.5);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 18px;
  width: min(100% - (var(--gutter) * 2), var(--max));
  margin-inline: auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: 0.02em;
  transition: opacity 0.25s;
}

.logo:hover {
  opacity: 0.9;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background-image: url('../static/logo.png');
  background-size: cover;
  background-position: center;
  display: grid;
  place-items: center;
  font-family: var(--font-brand);
  font-weight: 800;
  font-size: 0;
  color: transparent;
  box-shadow: 0 0 0 1px rgba(123, 63, 242, 0.22), 0 6px 22px rgba(123, 63, 242, 0.26);
  position: relative;
}

.logo-mark::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 13px;
  border: 1px solid rgba(123, 63, 242, 0.2);
  animation: pulseRing 3.5s ease-in-out infinite;
}

@keyframes pulseRing {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.04); }
}

.logo-text {
  display: inline-flex;
  align-items: center;
}

.logo-text .brand-word {
  font-size: 1.12em;
  font-weight: 800;
  letter-spacing: 0.08em;
}

/* 导航小字：提高饱和与对比，避免缩小后发灰发虚 */
.logo-text .brand-char,
.logo-text .brand-char:nth-child(1),
.logo-text .brand-char:nth-child(2),
.logo-text .brand-char:nth-child(3) {
  background:
    radial-gradient(
      ellipse at 18% 26%,
      #5ef0ff 0%,
      rgba(34, 230, 255, 0.95) 14%,
      rgba(34, 230, 255, 0.35) 36%,
      transparent 52%
    ),
    radial-gradient(
      ellipse at 70% 40%,
      #e879f9 0%,
      #c084fc 20%,
      #a855f7 42%,
      rgba(168, 85, 247, 0.45) 68%,
      transparent 100%
    ),
    radial-gradient(
      ellipse at 36% 84%,
      #60a5fa 0%,
      #3b82f6 24%,
      rgba(59, 130, 246, 0.4) 56%,
      transparent 100%
    ),
    linear-gradient(135deg, #6d28d9 0%, #9333ea 45%, #a855f7 100%);
  background-size: 100% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.35));
}

/* 品牌词：采用紫底 + 蓝区 + 青高光（图2方案），每字含蓝/紫/青，静态无动画 */
.brand-word {
  display: inline-flex;
  align-items: baseline;
  gap: 0.02em;
}

.brand-char {
  display: inline-block;
  font-style: normal;
  font-weight: inherit;
  line-height: 1;
  background:
    /* 青色高光 */
    radial-gradient(
      ellipse at 18% 28%,
      #22e6ff 0%,
      rgba(34, 230, 255, 0.85) 12%,
      rgba(34, 230, 255, 0.22) 34%,
      transparent 50%
    ),
    /* 紫色主体（略加重） */
    radial-gradient(
      ellipse at 68% 40%,
      #c026d3 0%,
      #a855f7 22%,
      #7c3aed 46%,
      rgba(124, 58, 237, 0.28) 70%,
      transparent 100%
    ),
    /* 蓝色区域 */
    radial-gradient(
      ellipse at 36% 84%,
      #2563eb 0%,
      #315cff 26%,
      rgba(49, 92, 255, 0.32) 58%,
      transparent 100%
    ),
    /* 紫色底色，保证整体偏紫且协调 */
    linear-gradient(135deg, #5b21b6 0%, #7e22ce 42%, #9333ea 100%);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* 三字光斑微偏移，整体仍统一，避免完全同质 */
.brand-char:nth-child(1) {
  background:
    radial-gradient(ellipse at 22% 26%, #22e6ff 0%, rgba(34, 230, 255, 0.85) 12%, rgba(34, 230, 255, 0.2) 34%, transparent 50%),
    radial-gradient(ellipse at 70% 42%, #c026d3 0%, #a855f7 22%, #7c3aed 46%, rgba(124, 58, 237, 0.28) 70%, transparent 100%),
    radial-gradient(ellipse at 34% 82%, #2563eb 0%, #315cff 26%, rgba(49, 92, 255, 0.32) 58%, transparent 100%),
    linear-gradient(135deg, #5b21b6 0%, #7e22ce 42%, #9333ea 100%);
  background-size: 100% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.brand-char:nth-child(2) {
  background:
    radial-gradient(ellipse at 16% 30%, #22e6ff 0%, rgba(34, 230, 255, 0.85) 12%, rgba(34, 230, 255, 0.2) 34%, transparent 50%),
    radial-gradient(ellipse at 64% 38%, #c026d3 0%, #a855f7 22%, #7c3aed 46%, rgba(124, 58, 237, 0.28) 70%, transparent 100%),
    radial-gradient(ellipse at 40% 86%, #2563eb 0%, #315cff 26%, rgba(49, 92, 255, 0.32) 58%, transparent 100%),
    linear-gradient(135deg, #5b21b6 0%, #7e22ce 45%, #9333ea 100%);
  background-size: 100% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.brand-char:nth-child(3) {
  background:
    radial-gradient(ellipse at 20% 24%, #22e6ff 0%, rgba(34, 230, 255, 0.85) 12%, rgba(34, 230, 255, 0.2) 34%, transparent 50%),
    radial-gradient(ellipse at 72% 44%, #c026d3 0%, #a855f7 22%, #7c3aed 46%, rgba(124, 58, 237, 0.28) 70%, transparent 100%),
    radial-gradient(ellipse at 38% 80%, #2563eb 0%, #315cff 26%, rgba(49, 92, 255, 0.32) 58%, transparent 100%),
    linear-gradient(135deg, #5b21b6 0%, #7e22ce 40%, #9333ea 100%);
  background-size: 100% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  padding: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.nav-links a {
  position: relative;
  padding: 8px 13px;
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  border-radius: 999px;
  transition: color 0.3s, background 0.3s, box-shadow 0.3s;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-links a.active,
html[data-nav="about"] #nav-about {
  color: #f4f6fb;
  background: var(--accent-grad);
  font-weight: 600;
  box-shadow: 0 6px 18px var(--accent-glow);
}

.nav-links a.active::after,
html[data-nav="about"] #nav-about::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.4);
  transform: translateX(-50%);
}

.nav-cta {
  margin-left: 4px !important;
  padding: 9px 18px !important;
  font-size: 0.875rem !important;
  border-radius: 999px !important;
  background: transparent !important;
  border: 1px solid rgba(179, 154, 250, 0.35) !important;
  color: var(--accent-bright) !important;
  font-weight: 600 !important;
  letter-spacing: 0.02em;
  box-shadow: none !important;
}

.nav-cta:hover {
  background: var(--accent-soft) !important;
  border-color: rgba(179, 154, 250, 0.55) !important;
  color: #fff !important;
  box-shadow: 0 0 20px var(--accent-glow) !important;
}

.nav-cta.active,
html[data-nav="contact"] #nav-contact {
  background: var(--accent-grad) !important;
  border-color: transparent !important;
  color: #f4f6fb !important;
  box-shadow: 0 6px 18px var(--accent-glow) !important;
}

.nav-cta.active::after,
html[data-nav="contact"] #nav-contact::after {
  display: none;
}

.nav-cta.active:hover,
html[data-nav="contact"] #nav-contact:hover {
  background: var(--accent-grad) !important;
  color: #f4f6fb !important;
  border-color: transparent !important;
  filter: brightness(1.05);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s, border-color 0.3s, filter 0.3s;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, 0.28) 50%, transparent 65%);
  transform: translateX(-120%);
  transition: transform 0.55s var(--ease);
}

.btn:hover::after {
  transform: translateX(120%);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent-grad);
  color: #f4f6fb;
  box-shadow: 0 8px 26px var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.06);
  box-shadow: 0 12px 32px var(--accent-glow);
}

.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  border-color: rgba(179, 154, 250, 0.45);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- Hero Split (text | video) ---------- */
.hero-split {
  min-height: calc(100vh - 8px);
  display: grid;
  grid-template-columns: minmax(260px, 400px) minmax(0, 1fr);
  gap: 34px;
  align-items: center;
  align-content: center;
  width: min(100% - 72px, 1280px);
  margin: 0 auto;
  padding: calc(var(--nav-h) + 28px) 0 40px;
  position: relative;
}

.hero-split__copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  animation: fadeSlideIn 0.9s var(--ease) both;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent-bright);
  margin-bottom: 14px;
}

.eyebrow::before {
  display: none;
}

.hero-brand {
  font-family: var(--font-brand);
  font-size: clamp(2.85rem, 5.6vw, 4.5rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.08;
  margin-bottom: 14px;
  isolation: isolate;
}

.hero-brand .brand-word {
  gap: 0.04em;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.1vw, 1.9rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
  color: var(--text);
}

.hero-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  max-width: 28em;
  margin-bottom: 28px;
  line-height: 1.85;
  font-weight: 400;
  text-wrap: pretty;
  line-break: auto;
  overflow-wrap: break-word;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.hero-meta span {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
}

.hero-split__media {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  min-height: 0;
  display: flex;
  justify-content: stretch;
  align-self: center;
  justify-self: stretch;
  animation: fadeSlideIn 1s var(--ease) 0.15s both;
}

.video-frame {
  position: relative;
  width: 100%;
  max-width: 100%;
  border-radius: 18px;
  padding: 1px;
  background: linear-gradient(145deg, rgba(140, 130, 190, 0.28), rgba(220, 192, 138, 0.16) 48%, rgba(120, 130, 170, 0.14));
  background-size: 200% 200%;
  animation: borderShift 8s ease infinite;
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.04),
    0 28px 70px rgba(0, 0, 0, 0.45),
    0 0 36px rgba(100, 110, 160, 0.06);
}

@keyframes borderShift {
  0%, 100% { background-position: 0% 40%; }
  50% { background-position: 100% 60%; }
}

.video-frame::before {
  content: '';
  position: absolute;
  inset: -40px;
  border-radius: 40px;
  background: radial-gradient(ellipse at center, rgba(120, 110, 170, 0.08), transparent 65%);
  z-index: -1;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}

.video-frame__inner {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  max-height: calc(100vw * 9 / 16);
  border-radius: 16px;
  overflow: hidden;
  background: #000;
  min-width: 0;
  min-height: 0;
}

/* 旧版微信内核不认 aspect-ratio，用固定比例撑开，避免 video 固有高度把页面顶开 */
@supports not (aspect-ratio: 16 / 9) {
  .video-frame__inner {
    height: 0;
    padding-bottom: 56.25%;
    max-height: none;
  }
}

.video-frame__inner video {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  object-position: center center;
  background: #000;
  image-rendering: auto;
}

.video-sound {
  position: absolute;
  right: 14px;
  bottom: 14px;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(8, 12, 20, 0.78);
  color: #f3f5f9;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  backdrop-filter: blur(10px);
  cursor: pointer;
  pointer-events: auto;
  transition: background 0.25s, border-color 0.25s, transform 0.25s, color 0.25s;
}

.video-sound:hover {
  background: rgba(12, 18, 28, 0.88);
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-1px);
}

.video-sound.is-on {
  border-color: rgba(139, 92, 246, 0.55);
  color: var(--accent);
}

.video-sound svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.video-sound .video-sound__on { display: none; }
.video-sound.is-on .video-sound__on { display: block; }
.video-sound.is-on .video-sound__muted { display: none; }

.video-frame__chrome {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent);
  pointer-events: none;
}

.video-dots {
  display: flex;
  gap: 6px;
}

.video-dots i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
}

.video-dots i:nth-child(1) { background: #ff5f57; }
.video-dots i:nth-child(2) { background: #febc2e; }
.video-dots i:nth-child(3) { background: #28c840; }

.video-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.85);
  text-transform: uppercase;
}

.video-live::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ff4d4d;
  box-shadow: 0 0 10px rgba(255, 77, 77, 0.7);
  animation: blink 1.4s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.video-caption {
  display: none;
}

/* ---------- Sections ---------- */
.section {
  padding: var(--space-section) 0;
  position: relative;
}

.section-sm {
  padding: 40px 0 72px;
}

.section-head {
  max-width: none;
  width: 100%;
  margin-bottom: 44px;
  margin-inline: auto;
  text-align: center;
}

.section-head.center {
  text-align: center;
  margin-inline: auto;
}

.section-label {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent-bright);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 2.5vw, 2.25rem);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
  word-break: keep-all;
  text-wrap: pretty;
}

.nowrap-title {
  white-space: nowrap;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.85;
  text-wrap: pretty;
  line-break: auto;
}

/* ---------- Cards ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-block);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-block);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.35s, background 0.35s, transform 0.4s var(--ease), box-shadow 0.4s;
}

.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px circle at var(--spot-x, 50%) var(--spot-y, 0%), rgba(140, 130, 190, 0.08), transparent 55%);
  opacity: 0;
  transition: opacity 0.4s;
}

.feature-card:hover {
  border-color: rgba(160, 150, 200, 0.22);
  background: var(--surface-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card), 0 0 28px rgba(100, 110, 150, 0.04);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid rgba(139, 92, 246, 0.18);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-family: var(--font-brand);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
  position: relative;
  z-index: 1;
}

.feature-card ul {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.feature-card li {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding-left: 18px;
  position: relative;
}

.feature-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.028), transparent), var(--bg-2);
  padding: 36px 24px;
  text-align: center;
  transition: background 0.35s;
}

.stat:hover {
  background: var(--bg-3);
}

.stat-value {
  font-family: var(--font-brand);
  font-size: 2.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--accent), #ddd6fe);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  line-height: 1.45;
  white-space: nowrap;
}

.stats-kicker {
  margin: 0 0 16px;
  text-align: center;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

/* ---------- 降本增效 ---------- */
.yield-title {
  font-size: clamp(1.65rem, 2.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.yield-shifts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  list-style: none;
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 80% at 50% 0%, rgba(220, 192, 138, 0.05), transparent 60%),
    var(--bg-2);
}

.yield-shifts li {
  margin: 0;
  padding: 32px 28px 30px;
  border-right: 1px solid var(--border);
  text-align: center;
}

.yield-shifts li:last-child {
  border-right: 0;
}

.yield-shifts__index {
  display: block;
  width: auto;
  height: auto;
  margin: 0 auto 6px;
  border: 0;
  background: linear-gradient(180deg, #f7f4ff 0%, #c4b5fd 42%, rgba(179, 154, 250, 0.28) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-size: clamp(4.6rem, 6.2vw, 6.2rem);
  font-family: var(--font-brand);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.82;
}

.yield-shifts__from {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.yield-shifts__arrow {
  display: block;
  width: 1px;
  height: 28px;
  margin: 16px auto;
  background: linear-gradient(var(--gold), rgba(220, 192, 138, 0.15));
  position: relative;
}

.yield-shifts__arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: translate(-50%, 1px) rotate(45deg);
}

.yield-shifts__to {
  margin: 0;
  color: var(--text);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.45;
}

.yield-note {
  margin: 28px 0 0;
  text-align: center;
  color: var(--gold);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.yield-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 16px;
}

.yield-stats article {
  padding: 26px 26px 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse 80% 70% at 0% 0%, rgba(220, 192, 138, 0.08), transparent 55%),
    var(--surface);
}

.yield-stats__ask {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.yield-stats b {
  display: block;
  font-size: clamp(1.85rem, 2.4vw, 2.35rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
  color: var(--accent-bright);
}

.yield-stats span {
  display: block;
  margin-top: 10px;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.yield-stats p {
  margin: 10px 0 0;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  word-break: break-word;
  line-break: auto;
  overflow-wrap: anywhere;
}

.yield-stats p.yield-stats__ask {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.4;
}

.yield-more {
  margin: 22px 0 0;
  text-align: center;
}

.yield-more a {
  color: var(--text-secondary);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
}

.yield-more a:hover {
  color: var(--accent-bright);
  border-bottom-color: var(--accent);
}

@media (max-width: 980px) {
  .yield-shifts,
  .yield-stats {
    grid-template-columns: 1fr;
  }

  .yield-title {
    font-size: 1.4rem;
    letter-spacing: 0;
    line-height: 1.35;
  }

  .yield-shifts li {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas:
      "index from"
      "index to";
    column-gap: 14px;
    row-gap: 2px;
    align-items: center;
    padding: 16px 16px 15px;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    text-align: left;
  }

  .yield-shifts li:last-child {
    border-bottom: 0;
  }

  .yield-shifts__index {
    grid-area: index;
    width: auto;
    height: auto;
    margin: 0;
    font-size: 3.4rem;
    letter-spacing: -0.05em;
    line-height: 0.85;
  }

  .yield-shifts__from {
    grid-area: from;
    margin: 0;
    font-size: 13px;
    letter-spacing: 0.04em;
  }

  .yield-shifts__arrow {
    display: none;
  }

  .yield-shifts__to {
    grid-area: to;
    font-size: 16px;
    letter-spacing: 0;
  }

  .yield-more {
    margin-top: 16px;
  }

  .yield-more a {
    font-size: 14px;
  }

  .yield-stats {
    gap: 0;
    margin-top: 12px;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-2);
  }

  .yield-note {
    margin-top: 16px;
    font-size: 13px;
    letter-spacing: 0.02em;
  }

  .yield-stats article {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "ask"
      "num"
      "label"
      "copy";
    row-gap: 4px;
    align-items: start;
    padding: 16px 16px 15px;
    border: 0;
    border-radius: 0;
    border-bottom: 1px solid var(--border);
    background: transparent;
  }

  .yield-stats article:last-child {
    border-bottom: 0;
  }

  .yield-stats b {
    grid-area: num;
    font-size: 1.55rem;
    white-space: nowrap;
  }

  .yield-stats span {
    grid-area: label;
    margin-top: 2px;
    font-size: 15px;
    letter-spacing: 0;
  }

  .yield-stats p {
    grid-area: copy;
    margin-top: 6px;
    font-size: 13px;
    line-height: 1.6;
    color: #b7c0d0;
  }

  .yield-stats p.yield-stats__ask {
    grid-area: ask;
    margin: 0 0 2px;
    color: var(--gold);
    font-size: 14px;
    letter-spacing: 0.06em;
  }
}

/* ---------- Page hero ---------- */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 56px;
  position: relative;
  text-align: center;
}

.page-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.page-hero .container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.015em;
  margin-bottom: 14px;
}

/* 与全站 .section-label 统一，避免被 .page-hero p 盖成灰色 */
.page-hero .section-label {
  color: var(--accent-bright);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  margin-bottom: 14px;
  max-width: none;
  line-height: 1.4;
}

.page-hero .page-hero__desc,
.page-hero .product-hero__lead {
  color: var(--text-secondary);
  font-size: 1.02rem;
  max-width: 36em;
  line-height: 1.85;
  margin-inline: auto;
  text-wrap: pretty;
  line-break: auto;
  overflow-wrap: break-word;
  word-break: normal;
}

.page-meta {
  margin-top: 14px !important;
  font-size: 0.92rem !important;
  color: var(--text-muted) !important;
  letter-spacing: 0.04em;
  white-space: nowrap;
  max-width: none !important;
}

.page-hero .pill-row {
  justify-content: center;
}

/* ---------- Detail blocks ---------- */
.detail-block {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 52px;
  align-items: center;
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

.detail-block:last-child {
  border-bottom: none;
}

.detail-block.reverse {
  direction: rtl;
}

.detail-block.reverse > * {
  direction: ltr;
}

.detail-num {
  font-family: var(--font-brand);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.14em;
  margin-bottom: 14px;
}

.detail-block h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: 0.015em;
  margin-bottom: 12px;
}

.detail-block > div > p {
  color: var(--text-secondary);
  margin-bottom: 22px;
  font-size: 0.96rem;
  line-height: 1.8;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.checklist .check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 7px;
  background: var(--accent-soft);
  border: 1px solid rgba(139, 92, 246, 0.25);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  margin-top: 2px;
}

.detail-visual {
  aspect-ratio: 16 / 11;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    linear-gradient(145deg, rgba(139, 92, 246, 0.09), transparent 50%),
    linear-gradient(225deg, rgba(224, 192, 138, 0.07), transparent 40%),
    var(--bg-3);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.detail-visual-inner {
  width: 100%;
  height: 100%;
  border-radius: 14px;
  border: 1px solid var(--border-strong);
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  backdrop-filter: blur(4px);
}

.visual-bar {
  display: flex;
  gap: 6px;
}

.visual-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}

.visual-bar i:nth-child(1) { background: #e86a6a; }
.visual-bar i:nth-child(2) { background: var(--gold); }
.visual-bar i:nth-child(3) { background: var(--accent); }

.visual-lines {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.visual-lines span {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.07);
}

.visual-lines span:nth-child(1) { width: 70%; background: rgba(139, 92, 246, 0.35); }
.visual-lines span:nth-child(2) { width: 90%; }
.visual-lines span:nth-child(3) { width: 55%; }
.visual-lines span:nth-child(4) { width: 80%; background: rgba(224, 192, 138, 0.25); }

.visual-caption {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 36px 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.35s, transform 0.35s var(--ease);
}

.step:hover {
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-4px);
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-brand);
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  display: block;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent), transparent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.94rem;
}

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  align-items: stretch;
  width: 100%;
}

.price-card {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.4s var(--ease), border-color 0.35s, box-shadow 0.4s;
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
}

.price-card.featured {
  border-color: rgba(139, 92, 246, 0.45);
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.1), transparent 42%),
    var(--bg-3);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.4), 0 0 50px rgba(139, 92, 246, 0.08);
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  color: #041018;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  letter-spacing: 0.06em;
}

.price-tier {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.price-card h3 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  margin-bottom: 8px;
}

.price-card .price-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.price-amount {
  font-family: var(--font-brand);
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 28px;
}

.price-amount small {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-features {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.price-features li {
  display: flex;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.price-features li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Pricing plans (标准价 / 早鸟价) ---------- */
.plan-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  max-width: none;
  width: 100%;
  margin-inline: auto;
}

.plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 36px 36px 32px;
  border-radius: 18px;
  border: 1px solid var(--border);
  border-left-width: 3px;
  background: var(--surface);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.3s, box-shadow 0.35s;
}

.plan-card--standard {
  border-left-color: var(--accent);
  background:
    linear-gradient(160deg, rgba(179, 154, 250, 0.06), transparent 42%),
    var(--surface);
}

.plan-card--early {
  border-color: rgba(90, 214, 239, 0.32);
  border-left-color: var(--promo);
  background:
    linear-gradient(160deg, rgba(90, 214, 239, 0.1), transparent 46%),
    var(--bg-3);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28), 0 0 40px rgba(90, 214, 239, 0.06);
}

.plan-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.plan-card--early:hover {
  box-shadow: var(--shadow-card), 0 0 44px rgba(90, 214, 239, 0.1);
}

.plan-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(90, 214, 239, 0.14);
  color: var(--promo);
  border: 1px solid rgba(90, 214, 239, 0.32);
}

.plan-card h3 {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 28px;
  padding-left: 8px;
}

.plan-fees {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
  padding: 0 0 0 8px;
}

.plan-fees li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.plan-fees li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.plan-fees li > span {
  color: var(--text-muted);
  font-size: 0.95rem;
  white-space: nowrap;
}

.plan-fees strong {
  font-family: var(--font-brand);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}

.plan-fees strong span {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 4px;
}

.plan-notes {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0 0 0 8px;
  flex: 1;
}

.plan-notes li {
  position: relative;
  padding-left: 14px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.6;
}

.plan-notes li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.plan-card--early .plan-notes li::before {
  background: var(--promo);
}

.plan-card .btn {
  width: 100%;
  margin-left: 8px;
  width: calc(100% - 8px);
}

.plan-foot {
  text-align: center;
  margin-top: 36px;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.plan-assurance {
  max-width: none;
  width: 100%;
  margin: 28px auto 0;
  padding: 24px 28px;
  border-radius: 16px;
  border: 1px solid rgba(139, 92, 246, 0.22);
  background:
    linear-gradient(135deg, rgba(139, 92, 246, 0.08), transparent 55%),
    var(--surface);
  text-align: center;
}

.plan-assurance .section-label {
  margin-bottom: 12px;
}

.plan-assurance > p:not(.section-label) {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0;
}

.plan-assurance a,
.core-card a,
.about-prose a,
.faq-item a,
.legal-doc a {
  color: var(--accent);
  border-bottom: 1px solid rgba(182, 124, 255, 0.45);
  transition: color 0.2s, border-color 0.2s;
}

.plan-assurance a:hover,
.core-card a:hover,
.about-prose a:hover,
.faq-item a:hover,
.legal-doc a:hover {
  color: var(--accent-bright);
  border-bottom-color: rgba(182, 124, 255, 0.85);
}

/* ---------- About / Contact ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: start;
  width: 100%;
}

.about-prose {
  text-align: left;
}

.about-prose h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 32px 0 12px;
}

.about-prose h2:first-child {
  margin-top: 0;
}

.about-prose p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  font-size: 0.98rem;
  line-height: 1.85;
}

.contact-panel {
  scroll-margin-top: calc(var(--nav-h) + 24px);
  border: 1px solid var(--border);
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.06), transparent 30%),
    var(--bg-3);
  padding: 36px 32px 40px;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  box-shadow: var(--shadow-card);
  text-align: center;
}

.contact-panel__brand {
  font-family: var(--font-brand);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
}

.contact-panel__tip {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 24px;
  margin-top: 0;
  letter-spacing: 0.02em;
}

.qr-wrap {
  background: #fff;
  border-radius: 14px;
  padding: 14px;
  width: fit-content;
  margin: 0 auto;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.qr-wrap img {
  width: 188px;
  height: auto;
  display: block;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.contact-item .label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.contact-item .value {
  font-size: 0.95rem;
  color: var(--text);
}

/* ---------- CTA ---------- */
.cta-band {
  margin: 32px 0 0;
  padding: 68px 64px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse at 18% 40%, rgba(139, 92, 246, 0.12), transparent 50%),
    radial-gradient(ellipse at 88% 20%, rgba(220, 192, 138, 0.08), transparent 42%),
    var(--bg-3);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.03) 50%, transparent 60%);
  animation: sheen 6s ease-in-out infinite;
}

@keyframes sheen {
  0%, 100% { transform: translateX(-30%); }
  50% { transform: translateX(30%); }
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 2.5vw, 2.1rem);
  margin-bottom: 12px;
  letter-spacing: 0.015em;
  position: relative;
  z-index: 1;
}

.cta-band p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 28em;
  margin-inline: auto;
  font-size: 0.96rem;
  position: relative;
  z-index: 1;
}

.cta-lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.cta-lines span {
  display: block;
  white-space: nowrap;
}

.cta-band .btn-group {
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: none;
  width: 100%;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.18);
  overflow: hidden;
  transition: border-color 0.3s;
}

.faq-item:hover,
.faq-item[open] {
  border-color: rgba(139, 92, 246, 0.28);
}

.faq-item summary {
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.08rem;
  letter-spacing: 0.02em;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-family: var(--font-brand);
  font-size: 1.35rem;
  color: var(--accent);
  flex-shrink: 0;
  font-weight: 500;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.8;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 72px;
  border-top: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.04), transparent 40%),
    var(--bg-2);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(420px, 50%);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.5), transparent);
}

.footer-main {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 48px 200px;
  padding: 56px 0 40px;
  max-width: 920px;
  margin-inline: auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  max-width: 280px;
  flex-shrink: 0;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.85;
  margin-bottom: 0;
}

.footer-links {
  display: grid;
  grid-template-columns: auto auto;
  gap: 28px 72px;
  align-content: start;
}

.footer-col h4 {
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: none;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 700;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 11px;
  transition: color 0.2s, transform 0.2s;
}

.footer-col a:last-child {
  margin-bottom: 0;
}

.footer-col a:hover {
  color: var(--accent);
  transform: translateX(3px);
}

.footer-legal {
  padding: 18px 0 32px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.footer-legal-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.footer-legal-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.85rem;
}

.footer-legal-right a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-legal-right a:hover {
  color: var(--accent);
}

.footer-legal-right .sep {
  color: var(--text-muted);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-icp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-icp .sep {
  width: 1px;
  height: 11px;
  background: var(--border-strong);
}

.footer-icp a {
  color: var(--text-muted);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
  transition: color 0.2s;
  white-space: nowrap;
}

.footer-icp a:hover {
  color: var(--accent);
}

/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* ---------- Misc ---------- */
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.pill {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.section-link {
  text-align: center;
  margin-top: 40px;
}

/* ---------- Back to top ---------- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #041018;
  background: linear-gradient(145deg, var(--accent), var(--accent-deep));
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    0 8px 28px rgba(0, 0, 0, 0.35),
    0 0 24px var(--accent-glow);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px) scale(0.92);
  transition:
    opacity 0.35s var(--ease),
    visibility 0.35s,
    transform 0.35s var(--ease),
    box-shadow 0.3s,
    filter 0.3s;
}

.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-top:hover {
  filter: brightness(1.08);
  transform: translateY(-3px);
  box-shadow:
    0 12px 36px rgba(0, 0, 0, 0.4),
    0 0 32px var(--accent-glow);
}

.back-top:active {
  transform: translateY(-1px) scale(0.97);
}

.back-top svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.back-top__ring {
  position: absolute;
  inset: -4px;
  border-radius: 16px;
  border: 1px solid rgba(139, 92, 246, 0.25);
  pointer-events: none;
  animation: pulseRing 3s ease-in-out infinite;
}

/* ---------- Legal documents ---------- */
.legal-section {
  padding-top: 40px;
  padding-bottom: var(--space-section);
}

.legal-doc {
  width: 100%;
  max-width: none;
  margin-inline: auto;
  text-align: left;
  word-break: normal;
  overflow-wrap: break-word;
  line-break: auto;
}

.legal-doc .legal-note {
  padding: 18px 20px;
  margin-bottom: 40px;
  border-radius: 12px;
  border: 1px dashed rgba(220, 192, 138, 0.35);
  background: var(--gold-soft);
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
  line-break: auto;
  word-break: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
}

.legal-doc .legal-note .nowrap {
  white-space: nowrap;
}

.legal-doc .legal-k {
  display: inline-block;
  min-width: 5em;
  margin-right: 12px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.legal-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  margin: 8px 0 24px;
  padding: 20px 22px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  max-width: 280px;
  text-align: center;
}

.legal-contact .legal-meta {
  margin: 0;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.6;
}

.legal-contact .legal-k {
  min-width: 0;
  margin-right: 10px;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
}

.legal-contact-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.legal-contact-qr img {
  width: 148px;
  height: auto;
  display: block;
  border-radius: 12px;
  background: #fff;
  padding: 10px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
}

.legal-contact-qr p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.legal-doc h2 {
  font-family: var(--font-display);
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 40px 0 16px;
  color: var(--text);
}

.legal-doc h2:first-of-type {
  margin-top: 0;
}

.legal-doc h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text);
}

.legal-doc p {
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.9;
  margin-bottom: 14px;
  max-width: none;
}

.legal-doc ul {
  margin: 10px 0 18px;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: none;
}

.legal-doc li {
  position: relative;
  padding-left: 18px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.85;
}

.legal-doc li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.legal-doc h2,
.legal-doc h3 {
  scroll-margin-top: calc(var(--nav-h) + 20px);
}

.legal-doc strong {
  color: var(--text);
  font-weight: 600;
}

.core-card,
.plan-card,
.product-panel,
.feature-card {
  backdrop-filter: blur(6px);
}

/* ---------- Product page (redesigned) ---------- */
.product-hero .product-hero__lead {
  font-size: 1.12rem;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 32em;
  text-align: center;
  margin-inline: auto;
}

.product-core {
  padding-top: 24px;
}

.core-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.core-card {
  position: relative;
  padding: 44px 40px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background:
    radial-gradient(480px circle at var(--spot-x, 30%) var(--spot-y, 20%), rgba(139, 92, 246, 0.1), transparent 50%),
    linear-gradient(160deg, rgba(139, 92, 246, 0.07), transparent 45%),
    var(--surface);
  min-height: 280px;
  transition: border-color 0.35s, transform 0.4s var(--ease), box-shadow 0.4s;
}

.core-card:hover {
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.core-card__index {
  display: block;
  font-family: var(--font-brand);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 22px;
}

.core-card h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
  line-height: 1.4;
}

.core-card p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.85;
}

.core-card__hint {
  margin-top: 20px;
  font-size: 0.88rem !important;
  color: var(--text-muted) !important;
  letter-spacing: 0.04em;
}

.promise-panel {
  max-width: var(--content-prose);
  margin-inline: auto;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.promise-lines {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 28em;
  margin-inline: auto;
}

.promise-lines span {
  display: block;
}

.product-promise {
  padding-top: 40px;
  padding-bottom: 48px;
}

.product-lower {
  padding-top: 24px;
  padding-bottom: var(--space-section);
  display: block;
}

.product-lower .container {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.product-panel {
  width: 100%;
  padding: 40px 44px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.product-panel__head {
  margin-bottom: 28px;
  text-align: left;
}

.product-panel__head .section-title {
  margin-bottom: 10px;
}

.product-panel__head .section-desc {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
}

.env-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0;
}

.env-list li {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 22px 24px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse at 0% 0%, rgba(179, 154, 250, 0.14), transparent 58%),
    rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.env-list .env-num {
  display: block;
  font-family: var(--font-brand);
  font-size: clamp(4.6rem, 6vw, 6.4rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.78;
  margin-bottom: 18px;
  background: linear-gradient(180deg, #f7f4ff 0%, #c4b5fd 38%, rgba(179, 154, 250, 0.22) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

@media (min-width: 981px) {
  .env-list li:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 58px;
    right: -17px;
    width: 18px;
    height: 2px;
    background: linear-gradient(90deg, rgba(179, 154, 250, 0.15), var(--accent-bright));
    z-index: 1;
  }

  .env-list li:not(:last-child)::before {
    content: '';
    position: absolute;
    top: 54px;
    right: -17px;
    border: 5px solid transparent;
    border-left-color: var(--accent-bright);
    z-index: 1;
  }
}

.env-list strong {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
  line-height: 1.45;
}

.env-list span {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.product-panel .faq-list {
  max-width: none;
  margin-inline: 0;
  width: 100%;
}

.steps-panel {
  width: 100%;
  padding: 64px 48px 60px;
  border-radius: 24px;
  border: 1px solid var(--border);
  text-align: center;
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, rgba(179, 154, 250, 0.16), transparent 62%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 42%),
    var(--surface);
}

.steps-panel .section-label {
  margin-bottom: 16px;
}

.steps-panel .section-title {
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.steps-panel__lead {
  margin: 18px auto 0;
  max-width: 28em;
  color: var(--text-secondary);
  font-size: 1.12rem;
  line-height: 1.9;
}

/* ---------- 销售全流程工具 ---------- */
.flow-page {
  padding-bottom: 8px;
}

.flow-hero .page-hero__desc {
  max-width: 28em;
}

.flow-hero::after {
  display: none;
}

.skill-list {
  list-style: none;
  width: 100%;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skill {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 8px 28px;
  align-items: start;
  padding: 26px 32px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 46%),
    rgba(255, 255, 255, 0.015);
}

.skill:last-child {
  border-bottom: 1px solid var(--border);
}

.skill__seal {
  width: 112px;
  height: 112px;
  margin: 6px auto 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-brand);
  font-size: 3.35rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.04em;
  border: 1px solid rgba(210, 196, 255, 0.45);
  background:
    radial-gradient(circle at 50% 42%, rgba(196, 181, 253, 0.16), rgba(139, 111, 212, 0.04) 64%, transparent 70%);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
}

.skill__main h2 {
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.skill__q,
.skill__a {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
}

.skill__q {
  color: var(--text);
  font-weight: 600;
}

.skill__a {
  margin-top: 6px;
  color: var(--text-secondary);
}

.skill__main--pair {
  display: grid;
  gap: 0;
}

.skill__main--pair > .skill__qa + .skill__qa {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.skill__more {
  display: inline-block;
  margin-top: 10px;
  color: var(--accent-bright);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.skill__more:hover {
  color: #fff;
}

.tools-entry {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
  padding: 18px 24px;
  border-radius: 14px;
  border: 1px solid rgba(179, 154, 250, 0.32);
  background: linear-gradient(90deg, rgba(124, 58, 237, 0.14), rgba(34, 230, 255, 0.06));
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: border-color 0.3s, transform 0.3s var(--ease), background 0.3s;
}

.tools-entry span {
  background: linear-gradient(135deg, #f4f1ff 10%, #d2c4ff 42%, #7dd3fc 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.tools-entry span.tools-entry__go {
  white-space: nowrap;
  text-wrap: nowrap;
}

.tools-entry i {
  font-style: normal;
  color: var(--accent-bright);
  font-size: 1.15rem;
  transition: transform 0.3s var(--ease);
}

.tools-entry:hover {
  border-color: rgba(196, 181, 253, 0.55);
  background: linear-gradient(90deg, rgba(124, 58, 237, 0.22), rgba(34, 230, 255, 0.1));
  transform: translateY(-2px);
}

.tools-entry:hover i {
  transform: translateX(4px);
}

/* ---------- 分享 ---------- */
.nav-share {
  flex: 0 0 auto;
  margin-left: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.nav-share:hover {
  border-color: rgba(179, 154, 250, 0.55);
  color: #fff;
  background: var(--accent-soft);
}

.share-mask {
  position: fixed;
  inset: 0;
  z-index: 240;
  background: rgba(4, 6, 12, 0.78);
}

.share-mask[hidden] {
  display: none;
}

body.share-open {
  overflow: hidden;
}

.share-mask .share-guide {
  display: none;
}

.share-mask.is-wechat {
  background: rgba(4, 6, 12, 0.72);
}

.share-mask.is-wechat .share-guide {
  display: block;
}

.share-mask.is-wechat .share-sheet {
  display: none;
}

.share-guide {
  position: absolute;
  top: calc(8px + env(safe-area-inset-top));
  right: 12px;
  left: auto;
  width: 268px;
  max-width: calc(100% - 24px);
  padding: 14px 14px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.16), transparent 42%),
    rgba(18, 22, 34, 0.98);
  color: var(--text);
  text-align: left;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.share-guide::before {
  content: '';
  position: absolute;
  top: -6px;
  right: 18px;
  width: 12px;
  height: 12px;
  background: #1c1730;
  border-left: 1px solid rgba(255, 255, 255, 0.14);
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  transform: rotate(45deg);
}

.share-guide__title {
  margin: 0 22px 0 0;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
}

.share-steps {
  margin: 12px 0 0;
}

.share-step {
  display: block;
  margin: 0;
  color: #e8edf5;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.share-step + .share-step {
  margin-top: 6px;
}

.share-step .nobr {
  white-space: nowrap;
}

.share-guide .wx-card {
  align-items: start;
  margin-top: 12px;
  padding: 10px;
  grid-template-columns: minmax(0, 1fr) 44px;
  gap: 10px;
}

.share-guide .wx-card strong {
  font-size: 13px;
  line-height: 1.3;
  white-space: nowrap;
}

.share-guide .wx-card span {
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.45;
  white-space: normal;
}

.share-guide .wx-card img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
}

.share-guide .share-x {
  top: 8px;
  right: 8px;
  width: 22px;
  height: 22px;
  font-size: 14px;
}

.wx-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px;
  gap: 14px;
  align-items: center;
  margin-top: 0;
  padding: 14px;
  border-radius: 12px;
  background: #f7f7f8;
  text-align: left;
}

.wx-card strong {
  display: block;
  color: #111111;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  word-break: break-word;
}

.wx-card span {
  display: block;
  margin-top: 6px;
  color: #888888;
  font-size: 13px;
  line-height: 1.45;
  word-break: break-word;
}

.wx-card img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 10px;
  background: #e6e6e6;
}

.share-guide b {
  color: #fff;
}

.share-sheet .btn {
  width: 100%;
  margin-top: 16px;
}

.share-sheet {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(340px, calc(100% - 40px));
  padding: 22px 18px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-strong);
  background:
    linear-gradient(180deg, rgba(139, 92, 246, 0.14), transparent 46%),
    #121826;
  box-shadow: var(--shadow-card);
}

.share-x {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: #c5cedb;
  font-size: 20px;
  line-height: 1;
}

.share-x:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

.share-sheet__title {
  margin: 0 36px 14px 2px;
  color: var(--accent-bright);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.share-copy {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px 8px 6px;
  border: 0;
  background: transparent;
  color: #b7c0d0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.share-copy:hover {
  color: #fff;
}

.share-toast {
  position: fixed;
  left: 50%;
  bottom: calc(28px + env(safe-area-inset-bottom));
  z-index: 260;
  transform: translateX(-50%) translateY(8px);
  max-width: calc(100% - 40px);
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(18, 22, 34, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}

.share-toast.is-on {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- Mobile / tablet (quick fit, no layout breakage) ---------- */
@media (max-width: 980px) {
  :root {
    --gutter: 18px;
    --space-section: 52px;
    --nav-h: 112px;
    --max: 100%;
  }

  html,
  body {
    -webkit-text-size-adjust: 100% !important;
    text-size-adjust: 100% !important;
  }

  body {
    font-size: 16px;
    line-height: 1.7;
  }

  .site-header {
    height: auto;
    padding-top: env(safe-area-inset-top);
    background: rgba(6, 9, 15, 0.94);
    border-bottom-color: var(--border);
    backdrop-filter: blur(16px);
  }

  .nav-inner {
    height: auto;
    min-height: 52px;
    padding: 8px 0 10px;
    flex-wrap: wrap;
    gap: 8px 10px;
  }

  .nav-links {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 2px;
    padding: 4px;
  }

  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-links a {
    flex: 0 0 auto;
    padding: 8px 14px;
    font-size: 0.92rem;
    white-space: nowrap;
  }

  .nav-share {
    margin-left: auto;
    padding: 8px 14px;
    font-size: 0.88rem;
  }

  .nav-cta {
    margin-left: 0 !important;
    padding: 8px 14px !important;
    font-size: 0.88rem !important;
  }

  .hero-split {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 22px;
    padding: calc(var(--nav-h) + 16px) 0 36px;
    width: min(100% - (var(--gutter) * 2), var(--max));
  }

  .hero-split__media {
    order: -1;
    transform: none !important;
    justify-content: stretch;
    overflow: hidden;
    min-height: 0;
    max-height: calc(100vw * 9 / 16);
    animation: none;
    opacity: 1;
  }

  .hero-split__copy,
  .hero-split__media {
    animation: none;
    opacity: 1;
    transform: none;
  }

  /* 微信把 background-clip:text 的透明填充漫到后面的字和实心按钮上，滑一下才重绘。
     currentcolor 挡不住，必须写成具体颜色，并关掉文字裁切。 */
  .hero-split__copy .section-label,
  .hero-split__copy .hero-title,
  .hero-split__copy .hero-desc,
  .hero-split__copy .hero-meta span,
  .hero-split__copy .btn {
    -webkit-background-clip: border-box;
    background-clip: border-box;
  }

  .hero-split__copy .section-label {
    -webkit-text-fill-color: #d2c4ff;
  }

  .hero-split__copy .hero-title {
    -webkit-text-fill-color: #eef1f6;
  }

  .hero-split__copy .hero-desc,
  .hero-split__copy .hero-meta span,
  .hero-split__copy .btn-ghost {
    -webkit-text-fill-color: #9ea7b8;
  }

  .hero-split__copy .btn-primary {
    -webkit-text-fill-color: #f4f6fb;
    color: #f4f6fb;
    background-image: linear-gradient(135deg, #4d6ef0 0%, #7c5cdb 50%, #9b7aef 100%);
  }

  /* 首屏大字本身也是透明裁切。微信里渐变经常第一帧不画，整段标题就是一块空白。
     导航里的小 logo 保留渐变；这里改成同一实色，三个字不再被裁切。 */
  html.is-wechat .hero-split__copy .brand-char,
  html.is-wechat .hero-split__copy .brand-char:nth-child(1),
  html.is-wechat .hero-split__copy .brand-char:nth-child(2),
  html.is-wechat .hero-split__copy .brand-char:nth-child(3) {
    background: none !important;
    -webkit-background-clip: border-box !important;
    background-clip: border-box !important;
    -webkit-text-fill-color: #d2c4ff !important;
    color: #d2c4ff !important;
    filter: none !important;
  }

  html.is-wechat .hero-split__copy {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    opacity: 1;
  }

  .video-frame {
    width: 100%;
  }

  .hero-brand {
    font-size: 2.45rem;
    margin-bottom: 8px;
  }

  .hero-title {
    font-size: 1.18rem;
    line-height: 1.45;
    margin-bottom: 10px;
  }

  .hero-desc {
    max-width: none;
    font-size: 0.95rem;
    line-height: 1.75;
    margin-bottom: 18px;
  }

  .hero-meta {
    gap: 8px;
    margin-bottom: 20px;
  }

  .hero-meta span {
    font-size: 0.8rem;
    padding: 6px 12px;
  }

  .section-head {
    margin-bottom: 22px;
  }

  .section-label,
  .page-hero .section-label {
    font-size: 0.84rem;
    letter-spacing: 0.1em;
    margin-bottom: 8px;
  }

  .section-desc,
  .feature-card p,
  .core-card p,
  .about-prose p {
    font-size: 0.95rem;
    line-height: 1.75;
  }

  .video-sound {
    right: 10px;
    bottom: 10px;
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
    justify-content: center;
  }

  .video-sound__text {
    display: none;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }

  .stat {
    padding: 22px 12px;
  }

  .stat-label {
    white-space: normal;
    max-width: 9em;
    margin-inline: auto;
    font-size: 0.8rem;
    line-height: 1.45;
  }

  .section-head,
  .section-head.center {
    max-width: none;
  }

  .section-title,
  .nowrap-title {
    white-space: normal;
    font-size: 1.42rem;
    line-height: 1.35;
    margin-bottom: 10px;
  }

  .page-hero {
    padding: calc(var(--nav-h) + 22px) 0 26px;
    text-align: center;
  }

  .page-hero h1 {
    font-size: 1.48rem;
    line-height: 1.4;
  }

  .m-break {
    display: block;
    height: 0;
  }

  .page-hero .page-hero__desc,
  .page-hero .product-hero__lead {
    font-size: 0.95rem;
    line-height: 1.75;
  }

  .legal-doc h2 {
    font-size: 1.12rem;
    margin: 28px 0 12px;
  }

  .legal-doc p,
  .legal-doc li {
    font-size: 0.94rem;
    line-height: 1.8;
  }

  .skill__main h2 {
    font-size: 1.12rem;
  }

  .skill__q,
  .skill__a {
    font-size: 0.94rem;
    line-height: 1.7;
  }

  .back-top {
    bottom: calc(16px + env(safe-area-inset-bottom));
  }

  .core-grid,
  .plan-grid,
  .about-grid,
  .env-list {
    grid-template-columns: 1fr;
  }

  .env-list .env-num {
    font-size: 3.8rem;
    margin-bottom: 10px;
  }

  .skill {
    grid-template-columns: 84px 1fr;
    gap: 14px;
    padding: 18px 16px;
    align-items: start;
  }

  .tools-entry {
    padding: 16px 14px;
    font-size: 0.92rem;
    text-align: center;
  }

  .skill__seal {
    width: 76px;
    height: 76px;
    font-size: 2.15rem;
    box-shadow: none;
  }

  .plan-foot {
    white-space: normal;
    font-size: 0.9rem;
    padding-inline: 8px;
  }

  .plan-assurance {
    margin-top: 20px;
    padding: 20px 16px;
  }

  .cta-band {
    padding: 36px 20px;
    text-align: center;
  }

  .cta-lines span {
    display: inline;
  }

  .btn-group {
    justify-content: flex-start;
  }

  .cta-band .btn-group {
    justify-content: center;
  }

  .footer-main {
    flex-direction: column;
    gap: 32px;
    padding: 40px 0 28px;
    max-width: none;
  }

  .footer-brand {
    max-width: none;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px 20px;
    width: 100%;
  }

  .contact-panel {
    position: static;
  }

  .about-grid {
    gap: 28px;
  }

  .legal-doc {
    padding-inline: 0;
  }

  .bg-orb {
    width: 70vw;
    height: 70vw;
    opacity: 0.22;
  }

  .back-top {
    right: 14px;
    bottom: calc(16px + env(safe-area-inset-bottom));
  }
}

@media (max-width: 480px) {
  :root {
    --gutter: 16px;
    --space-section: 44px;
  }

  .logo-text {
    font-size: 1.02rem;
  }

  .nav-share,
  .nav-cta {
    padding: 7px 12px !important;
    font-size: 0.84rem !important;
  }

  .hero-meta {
    gap: 8px;
  }

  .hero-meta span {
    font-size: 0.78rem;
    padding: 6px 11px;
  }

  .stats-kicker {
    font-size: 0.92rem;
    line-height: 1.6;
  }

  .stat {
    padding: 16px 10px;
  }

  .stat-value {
    font-size: 1.7rem;
  }

  .btn {
    width: 100%;
  }

  .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }

  .feature-card,
  .core-card,
  .plan-card {
    padding: 22px 18px;
  }

  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-legal-left {
    width: 100%;
  }

  .footer-legal-right {
    width: 100%;
    justify-content: flex-start;
  }
}

/* 手机端按屏宽重排，避免桌面布局被挤出屏幕 */
@media (max-width: 980px) {
  .nav-inner,
  .container,
  .hero-split,
  .hero-split__copy,
  .hero-split__media,
  .video-frame,
  .skill,
  .skill__main,
  .nav-links {
    min-width: 0;
    max-width: 100%;
  }

  .nav-links a {
    padding: 7px 10px;
    font-size: 0.82rem;
  }

  h1,
  h2,
  h3,
  p,
  li,
  .section-desc,
  .section-title,
  .skill__q,
  .skill__a,
  .stat-label,
  .feature-card p,
  .core-card p,
  .legal-doc p,
  .tools-entry span {
    word-break: normal;
    line-break: auto;
  }

  .hero-title,
  .hero-desc {
    word-break: normal;
    line-break: auto;
    overflow-wrap: break-word;
  }

  p,
  .hero-desc,
  .section-desc,
  .skill__a,
  .skill__q,
  .feature-card p,
  .core-card p,
  .legal-doc p {
    overflow-wrap: break-word;
  }

  .hero-split {
    width: 100%;
    gap: 16px;
    padding: calc(var(--nav-h) + 8px) 0 28px;
  }

  .video-frame {
    border-radius: 0;
    overflow: hidden;
    animation: none;
  }

  .video-frame::before {
    display: none;
  }

  .hero-split__copy {
    padding-inline: 20px;
  }

  h1,
  h2,
  h3,
  .section-title,
  .hero-title,
  .stat-label,
  .tools-entry span,
  .skill__q {
    text-wrap: wrap;
  }

  p,
  .hero-desc,
  .section-desc,
  .skill__a,
  .feature-card p,
  .core-card p,
  .legal-doc p {
    text-wrap: wrap;
  }

  .section-title {
    font-size: 1.32rem;
  }

  .hero-desc {
    font-size: 0.98rem;
    line-height: 1.7;
  }

  .hero-split .btn-group,
  .cta-band .btn-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-split .btn,
  .cta-band .btn,
  .section-link .btn {
    width: 100%;
  }

  .stat-label {
    max-width: none;
    font-size: 0.84rem;
    line-height: 1.45;
  }

  .stats {
    gap: 10px;
  }

  .stat {
    padding: 16px 12px 14px;
  }

  .feature-card:has(.feature-icon) {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    column-gap: 12px;
    row-gap: 4px;
    align-items: center;
    padding: 16px;
  }

  .feature-card:has(.feature-icon) .feature-icon {
    grid-row: 1 / span 2;
    width: 44px;
    height: 44px;
    margin: 0;
  }

  .feature-card:has(.feature-icon) h3 {
    margin: 0;
    font-size: 1.05rem;
  }

  .feature-card:has(.feature-icon) p {
    font-size: 0.92rem;
    line-height: 1.65;
  }

  .feature-card:not(:has(.feature-icon)) {
    padding: 16px 16px 16px 18px;
    border-left: 3px solid rgba(179, 154, 250, 0.55);
  }

  .feature-card:not(:has(.feature-icon)) h3 {
    font-size: 1.05rem;
    margin-bottom: 6px;
  }

  .core-card {
    min-height: 0;
    padding: 18px 16px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 12px;
    row-gap: 6px;
    align-items: start;
  }

  .core-card__index {
    grid-row: 1 / span 2;
    margin: 0;
    font-size: 1.15rem;
  }

  .core-card h2 {
    font-size: 1.12rem;
    margin: 0;
  }

  .core-card p {
    grid-column: 2;
    font-size: 0.94rem;
    line-height: 1.7;
  }

  .env-list {
    gap: 12px;
  }

  .env-list li {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    column-gap: 10px;
    row-gap: 2px;
    align-items: center;
    padding: 14px 16px;
    text-align: left;
  }

  .env-list .env-num {
    grid-row: 1 / span 2;
    font-size: 2.5rem;
    margin: 0;
    line-height: 1;
  }

  .env-list strong {
    font-size: 1.02rem;
  }

  .env-list li > span:not(.env-num) {
    font-size: 0.88rem;
  }

  .skill {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 12px 14px;
    padding: 16px;
  }

  .skill__seal {
    width: 52px;
    height: 52px;
    margin: 2px 0 0;
    font-size: 1.55rem;
  }

  .skill__main h2 {
    font-size: 1.06rem;
    margin-bottom: 6px;
  }

  .skill__q,
  .skill__a {
    font-size: 0.95rem;
    line-height: 1.65;
  }

  .tools-entry {
    flex-direction: column;
    gap: 2px;
    padding: 16px 18px;
    font-size: 0.98rem;
    line-height: 1.55;
    text-align: center;
  }

  .plan-card {
    padding: 14px 12px 12px;
  }

  body {
    font-size: 14px;
    line-height: 1.65;
  }

  .nav-links {
    overflow: visible;
    justify-content: stretch;
    width: 100%;
    gap: 0;
    padding: 2px;
  }

  .nav-links a {
    flex: 1 1 0;
    min-width: 0;
    padding: 6px 0;
    font-size: 11px;
    letter-spacing: 0;
    text-align: center;
  }

  .nav-links a.active::after {
    width: 10px;
    height: 2px;
    bottom: 1px;
  }

  .nav-share,
  .nav-cta {
    padding: 5px 10px !important;
    font-size: 12px !important;
  }

  .logo-text {
    font-size: 1rem;
  }

  .hero-brand {
    font-size: 1.85rem;
    margin-bottom: 4px;
  }

  .hero-title {
    font-size: 15px;
    margin-bottom: 8px;
  }

  .section-label,
  .page-hero .section-label {
    font-size: 12px;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
  }

  .section-title,
  .page-hero h1 {
    font-size: 17px;
    line-height: 1.4;
    margin-bottom: 8px;
  }

  .section-head {
    margin-bottom: 14px;
  }

  .hero-desc,
  .section-desc,
  .page-hero .page-hero__desc,
  .page-hero .product-hero__lead,
  .promise-lines,
  .promise-lines span,
  .cta-lines,
  .cta-lines span {
    font-size: 12px;
    line-height: 1.6;
  }

  .cta-lines span {
    display: block;
    white-space: normal;
  }

  .product-lower .container {
    width: 100%;
    max-width: 100%;
  }

  .product-panel {
    width: 100%;
    padding: 16px 14px;
    box-sizing: border-box;
  }

  .product-panel__head {
    margin-bottom: 14px;
  }

  .env-list,
  .faq-list,
  .env-list li,
  .faq-item {
    width: 100%;
  }

  .env-list {
    grid-template-columns: 1fr;
  }

  .feature-card:has(.feature-icon) h3,
  .feature-card:not(:has(.feature-icon)) h3,
  .core-card h2,
  .skill__main h2,
  .skill__q,
  .plan-card h3 {
    font-size: 15px;
  }

  .stat-value {
    font-size: 1.45rem;
    margin-bottom: 4px;
  }

  .stat-label {
    font-size: 12px;
  }

  .btn {
    width: auto;
    padding: 8px 14px;
    font-size: 13px;
  }

  .hero-split .btn,
  .cta-band .btn,
  .section-link .btn {
    width: auto;
    padding: 8px 14px;
    font-size: 13px;
  }

  .hero-split .btn-group,
  .cta-band .btn-group,
  .btn-group {
    flex-direction: row;
    justify-content: center;
    width: 100%;
    gap: 10px;
  }

  .plan-card .btn {
    width: 100%;
    flex: none;
    padding: 7px 10px;
    font-size: 13px;
  }

  .plan-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .plan-fees {
    margin-bottom: 10px;
  }

  .plan-fees li {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding-bottom: 8px;
  }

  .plan-fees strong {
    font-size: 1.15rem;
  }

  .plan-notes {
    gap: 4px;
    margin-bottom: 14px;
  }

  .plan-badge {
    top: 10px;
    right: 10px;
    font-size: 11px;
    padding: 2px 8px;
  }

  .cta-band {
    padding: 20px 16px;
  }

  .cta-band h2 {
    font-size: 17px;
  }

  .footer-main {
    align-items: center;
    text-align: center;
    gap: 10px;
    padding: 18px 0 6px;
  }

  .footer-brand {
    align-items: center;
    max-width: none;
  }

  .footer-brand .logo {
    margin-bottom: 0;
  }

  .footer-brand p,
  .footer-col:first-child,
  .footer-col h4 {
    display: none;
  }

  .footer-links {
    display: flex;
    width: 100%;
    justify-content: center;
    gap: 0;
  }

  .footer-col {
    display: flex;
    justify-content: center;
    gap: 18px;
    text-align: center;
  }

  .footer-links .footer-col:first-child {
    display: none;
  }

  .footer-col a {
    margin: 0;
    font-size: 12px;
  }

  .site-footer {
    margin-top: 4px;
  }

  section.section,
  section.section-sm,
  .product-core,
  .product-promise,
  .product-lower {
    padding-top: 22px !important;
    padding-bottom: 22px !important;
  }

  .grid-2,
  .grid-3,
  .skill-list,
  .faq-list,
  .core-grid {
    gap: 12px;
  }

  .cta-band {
    margin-top: 0;
    padding: 20px 16px;
  }

  .footer-legal {
    padding: 8px 0 18px;
    border-top: none;
  }

  .footer-legal,
  .footer-legal-left,
  .footer-legal-right {
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
  }

  .footer-copyright,
  .footer-icp,
  .footer-col a {
    font-size: 12px;
  }
}

/* ---------- 销售全流程：圆环 ---------- */
.flow-board {
  position: relative;
  padding-top: 0;
}

.flow-board::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 46%;
  width: min(760px, 92%);
  height: 560px;
  transform: translate(-50%, -42%);
  background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.2), rgba(88, 28, 135, 0.08) 46%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.flow-stage {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px minmax(0, 1fr);
  column-gap: 28px;
  row-gap: 28px;
  align-items: start;
}

.orbit {
  container-type: inline-size;
  grid-column: 2;
  grid-row: 2;
  width: 400px;
  max-width: 100%;
  justify-self: center;
  align-self: center;
  margin: 8px 0;
  position: relative;
}

.orbit__ring {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
}

.orbit__track {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.orbit__halo {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 58%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.62) 0%, rgba(99, 102, 241, 0.28) 38%, rgba(88, 28, 135, 0.08) 58%, transparent 72%);
  filter: blur(12px);
  pointer-events: none;
}

.orbit__core {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  width: 40cqi;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  background:
    radial-gradient(circle at 50% 32%, rgba(255, 255, 255, 0.96) 0%, rgba(214, 236, 255, 0.42) 9%, transparent 20%),
    radial-gradient(circle at 50% 46%, #f7fbff 0%, #b9ddff 14%, #5b93ff 34%, #3a4de4 58%, #6a2fd8 80%, #1a1048 100%);
  box-shadow:
    0 0 10px rgba(190, 224, 255, 0.95),
    0 0 26px rgba(80, 150, 255, 0.85),
    0 0 52px rgba(90, 80, 255, 0.5),
    inset 0 -12px 18px rgba(24, 16, 90, 0.42),
    inset 0 8px 12px rgba(255, 255, 255, 0.42);
}

.orbit__mark {
  width: 52%;
  height: auto;
  display: block;
  margin-top: 2px;
  filter: drop-shadow(0 1px 2px rgba(40, 80, 180, 0.35));
}

.orbit__core span {
  font-size: clamp(15px, 3.7cqi, 17px);
  letter-spacing: 0.06em;
  text-indent: 0.06em;
  color: #fff;
  font-weight: 600;
  line-height: 1.1;
  text-shadow: 0 1px 2px rgba(24, 32, 110, 0.45);
}

.orbit__dash {
  animation: orbitDash 36s linear infinite;
}

@keyframes orbitDash {
  to { stroke-dashoffset: -280; }
}

.skill--tuo,
.orbit__node--tuo {
  --tone: #3b82f6;
  --tone-soft: rgba(59, 130, 246, 0.16);
  --tone-glow: rgba(59, 130, 246, 0.55);
}

.skill--zhuan,
.orbit__node--zhuan {
  --tone: #a78bfa;
  --tone-soft: rgba(167, 139, 250, 0.16);
  --tone-glow: rgba(167, 139, 250, 0.55);
}

.skill--fang,
.orbit__node--fang {
  --tone: #9ed9c8;
  --tone-soft: rgba(158, 217, 200, 0.16);
  --tone-glow: rgba(158, 217, 200, 0.36);
}

.skill--chu,
.orbit__node--chu {
  --tone: #e6d3a4;
  --tone-soft: rgba(230, 211, 164, 0.16);
  --tone-glow: rgba(230, 211, 164, 0.36);
}

.skill--quan,
.orbit__node--quan {
  --tone: #e879f9;
  --tone-soft: rgba(232, 121, 249, 0.16);
  --tone-glow: rgba(232, 121, 249, 0.52);
}

.orbit__node--tuo { --cx: 0; --cy: -1; }
.orbit__node--quan { --cx: 0.951057; --cy: -0.309017; }
.orbit__node--chu { --cx: 0.587785; --cy: 0.809017; }
.orbit__node--fang { --cx: -0.587785; --cy: 0.809017; }
.orbit__node--zhuan { --cx: -0.951057; --cy: -0.309017; }

.orbit__node {
  position: absolute;
  left: calc(50% + var(--cx) * 38.636% - 9.091%);
  top: calc(50% + var(--cy) * 38.636% - 9.091%);
  z-index: 3;
  width: 18.182%;
  height: 18.182%;
  margin: 0;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: #fff;
  text-decoration: none;
  background: radial-gradient(circle at 50% 36%, #162033 0%, #090f23 64%);
  border: 2px solid var(--tone);
  box-shadow: 0 0 20px var(--tone-glow), 0 8px 16px rgba(0, 0, 0, 0.35);
  transition: transform 0.3s, box-shadow 0.3s;
}

.orbit__ico {
  width: 34%;
  height: 34%;
  display: block;
  color: var(--tone);
}

.orbit__node .brand-char {
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  color: #fff;
  background: none;
  background-clip: border-box;
  -webkit-background-clip: border-box;
  -webkit-text-fill-color: #fff;
}

.orbit__node:hover {
  transform: scale(1.08);
  box-shadow:
    0 0 0 1px #fff,
    0 0 24px var(--tone-glow),
    0 10px 18px rgba(0, 0, 0, 0.35);
}

.flow-wires {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 2;
}

.flow-stage .skill-list {
  display: contents;
}

.skill--tuo,
.skill--chu {
  grid-column: 1 / -1;
  justify-self: center;
  width: min(100%, 520px);
}
.skill--tuo { grid-row: 1; }
.skill--chu {
  grid-row: 3;
  align-self: start;
  margin-bottom: 0;
}
.flow-side {
  grid-column: 1;
  grid-row: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 28px;
  min-width: 0;
  align-self: stretch;
}
.flow-side--right {
  grid-column: 3;
  --tone: #e879f9;
}

.flow-stage .skill {
  display: block;
  position: relative;
  z-index: 3;
  padding: 12px 14px 12px 16px;
  scroll-margin-top: calc(var(--nav-h) + 16px);
  border: 1px solid transparent;
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(12, 18, 32, 0.94), rgba(8, 12, 22, 0.92)) padding-box,
    linear-gradient(
      90deg,
      color-mix(in srgb, var(--tone) 72%, transparent) 0%,
      color-mix(in srgb, var(--tone) 28%, transparent) 18%,
      color-mix(in srgb, var(--tone) 10%, transparent) 100%
    ) border-box;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.flow-stage .skill__main {
  min-width: 0;
}

.skill--pair {
  padding: 0;
}

.skill--pair .skill__part {
  padding: 12px 14px 12px 16px;
}

.skill--pair .skill__part + .skill__part {
  border-top: 1px solid color-mix(in srgb, var(--tone, #e879f9) 34%, transparent);
}

.flow-stage .skill::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--tone, #c4b5fd);
  pointer-events: none;
}

.skill:target {
  box-shadow:
    0 0 0 1px var(--tone),
    0 0 28px var(--tone-glow, transparent);
}

.skill__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  column-gap: 8px;
  row-gap: 4px;
  margin: 0 0 8px;
  font-size: inherit;
  letter-spacing: 0;
}

.skill__name {
  order: 1;
  margin-right: auto;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text);
}

.skill__tag {
  order: 3;
  flex: 1 0 100%;
  min-width: 0;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.45;
  color: var(--tone);
}

.skill__actions {
  order: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.skill__go {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 1px;
  padding: 5px 9px 5px 8px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--tone) 46%, transparent);
  background: color-mix(in srgb, var(--tone) 14%, transparent);
  color: color-mix(in srgb, var(--tone) 62%, #fff);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  flex: none;
}

.skill__go--intro {
  padding-left: 12px;
}

.skill__go-ico {
  width: 15px;
  height: 15px;
  flex: none;
}

.skill__go-chev {
  width: 12px;
  height: 12px;
  flex: none;
  margin-right: -1px;
}

.flow-stage .skill__q,
.flow-stage .skill__a {
  font-size: 14px;
  line-height: 1.65;
}

.flow-stage .skill__a {
  margin-top: 4px;
  color: #d5dce8;
}

.skill__go:hover,
.skill__video:hover {
  background: color-mix(in srgb, var(--tone) 26%, transparent);
  border-color: color-mix(in srgb, var(--tone) 72%, transparent);
  color: #fff;
  filter: none;
}

.skill__video {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 3px;
  margin: 0;
  padding: 5px 10px 5px 7px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--tone) 52%, transparent);
  background: color-mix(in srgb, var(--tone) 18%, transparent);
  color: color-mix(in srgb, var(--tone) 48%, #fff);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
}

.skill__video svg {
  width: 13px;
  height: 13px;
  flex: none;
}

.skill__video span {
  writing-mode: horizontal-tb;
  letter-spacing: 0.02em;
}

.code-mask {
  position: fixed;
  inset: 0;
  z-index: 260;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(4, 6, 12, 0.78);
}

.code-mask[hidden] {
  display: none;
}

.code-dialog {
  position: relative;
  width: min(100%, 400px);
  padding: 44px 56px 36px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(16, 18, 28, 0.98);
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.code-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.code-title {
  margin: 0 0 14px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.code-img {
  display: block;
  width: 200px;
  height: 200px;
  margin: 4px auto 0;
  padding: 18px;
  object-fit: contain;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.code-hint {
  margin: 18px 0 0;
  color: var(--text-secondary);
  font-size: 0.86rem;
}

.video-dialog {
  width: min(100%, 760px);
  padding: 44px 28px 28px;
}

.video-player {
  display: block;
  width: min(100%, 680px);
  max-height: min(68vh, 520px);
  margin: 4px auto 0;
  border-radius: 12px;
  background: #000;
}

.video-player[hidden] {
  display: none;
}

.video-dialog.is-pending {
  width: min(100%, 420px);
  padding: 48px 36px 40px;
}

.video-pending {
  margin: 6px 0 4px;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.video-pending[hidden] {
  display: none;
}

@keyframes orbitSpin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .orbit__spin,
  .orbit__dash { animation: none; }
}

@media (max-width: 980px) {
  .flow-stage {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .flow-stage .skill-list {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 22px;
  }

  .flow-side,
  .flow-side--left,
  .flow-side--right {
    display: contents;
  }

  #tuo { order: 1; }
  #quan { order: 2; }
  #quan-poster { order: 3; }
  #chu { order: 4; }
  #fang { order: 5; }
  #zhuan { order: 6; }

  .skill--tuo,
  .skill--quan,
  .skill--chu,
  .skill--fang,
  .skill--zhuan {
    grid-column: auto;
    grid-row: auto;
    width: 100%;
    justify-self: stretch;
  }

  .flow-wires {
    display: none;
  }

  .orbit {
    width: min(86vw, 320px);
    margin: 0 auto 4px;
  }

  .orbit__node .brand-char {
    font-size: 13px;
    font-weight: 700;
  }

  .orbit__core span {
    letter-spacing: 0.04em;
    text-indent: 0.04em;
  }

  .flow-stage .skill {
    display: block;
    padding: 11px 12px 11px 14px;
  }

  .skill--pair {
    padding: 0;
  }

  .skill--pair .skill__part {
    padding: 11px 12px 11px 14px;
  }

  .skill__video {
    padding: 4px 8px 4px 6px;
    font-size: 12px;
  }

  .skill__video svg {
    width: 12px;
    height: 12px;
  }

  .skill__head {
    column-gap: 8px;
    row-gap: 2px;
    margin-bottom: 8px;
  }

  .skill__name {
    font-size: 15px;
  }

  .skill__tag {
    font-size: 12px;
  }

  .skill__go {
    padding: 4px 7px 4px 6px;
    font-size: 12px;
    gap: 3px;
  }

  .skill__go--intro {
    padding-left: 10px;
  }

  .skill__go-ico {
    width: 13px;
    height: 13px;
  }

  .skill__q,
  .skill__a {
    font-size: 12px;
    line-height: 1.6;
  }
}

/* 手机 H5：字号、间距、对比跟着手指阅读，不再把桌面字缩到看不清 */
@media (max-width: 480px) {
  :root {
    --gutter: 20px;
    --space-section: 48px;
  }

  body {
    font-size: 16px;
    line-height: 1.7;
    color: #eef1f6;
  }

  .nav-links {
    overflow-x: auto;
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: 4px;
    padding: 2px 0 4px;
  }

  .nav-links a {
    flex: 0 0 auto;
    min-width: 0;
    padding: 8px 10px;
    font-size: 14px;
    line-height: 1.4;
    color: #c5cedb;
  }

  .nav-links a.active {
    color: #f4f0ff;
  }

  .nav-share,
  .nav-cta {
    min-height: 36px;
    padding: 8px 14px !important;
    font-size: 14px !important;
  }

  .hero-brand {
    font-size: 2.15rem;
  }

  .hero-title {
    font-size: 18px;
    line-height: 1.45;
    color: #eef1f6;
    -webkit-text-fill-color: #eef1f6;
  }

  .hero-desc,
  .section-desc,
  .page-hero .page-hero__desc,
  .page-hero .product-hero__lead,
  .feature-card p,
  .core-card p,
  .yield-stats p,
  .yield-shifts__to,
  .promise-lines,
  .promise-lines span,
  .cta-lines,
  .cta-lines span {
    font-size: 15px;
    line-height: 1.7;
    color: #c5cedb;
  }

  .hero-split__copy .hero-desc,
  .hero-split__copy .hero-meta span,
  .hero-split__copy .btn-ghost {
    -webkit-text-fill-color: #c5cedb;
  }

  .section-label,
  .page-hero .section-label {
    font-size: 13px;
    color: var(--accent-bright);
    -webkit-text-fill-color: #d2c4ff;
  }

  .section-title,
  .page-hero h1,
  .yield-title,
  .cta-band h2 {
    font-size: 22px;
    line-height: 1.35;
    color: #f4f6fb;
  }

  .section-head {
    margin-bottom: 20px;
  }

  .feature-card:has(.feature-icon) h3,
  .feature-card:not(:has(.feature-icon)) h3,
  .core-card h2,
  .skill__main h2,
  .plan-card h3 {
    font-size: 17px;
    color: #f4f6fb;
  }

  .feature-card,
  .core-card,
  .plan-card {
    padding: 20px 16px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .core-grid {
    gap: 14px;
  }

  .stat {
    padding: 18px 12px;
  }

  .stat-value {
    font-size: 1.7rem;
  }

  .stat-label {
    font-size: 13px;
    color: #b7c0d0;
  }

  .btn,
  .hero-split .btn,
  .cta-band .btn,
  .section-link .btn {
    min-height: 44px;
    padding: 10px 16px;
    font-size: 15px;
  }

  .hero-split .btn,
  .cta-band .btn,
  .section-link .btn,
  .btn {
    width: 100%;
  }

  .hero-split .btn-group,
  .cta-band .btn-group,
  .btn-group {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .plan-card .btn {
    width: 100%;
    font-size: 14px;
  }

  .yield-shifts__to {
    color: #eef1f6;
    font-size: 16px;
    font-weight: 600;
    text-align: left;
  }

  .yield-stats p {
    color: #b7c0d0;
    font-size: 13px;
  }

  .yield-stats p.yield-stats__ask {
    color: var(--gold);
    font-size: 14px;
  }

  .steps-panel {
    padding: 28px 18px 26px;
  }

  .steps-panel__lead {
    font-size: 15px;
    line-height: 1.7;
    color: #c5cedb;
  }

  .yield-stats b {
    font-size: 1.55rem;
  }

  .skill__q,
  .skill__a {
    font-size: 14px;
    line-height: 1.65;
    color: #d5dce8;
  }

  .skill__tag {
    font-size: 13px;
  }

  .code-dialog {
    width: min(100%, 320px);
    padding: 36px 28px 28px;
  }

  .code-img {
    width: 176px;
    height: 176px;
    padding: 16px;
  }

  .video-dialog {
    width: min(100%, 360px);
    padding: 40px 14px 16px;
  }

  .share-sheet {
    width: min(340px, calc(100% - 40px));
    padding: 20px 16px 12px;
  }
}

.share-guide,
.share-guide p,
.share-guide span,
.share-guide strong {
  word-break: break-word;
  line-break: auto;
  overflow-wrap: break-word;
}

.share-guide .wx-card strong {
  white-space: nowrap;
  word-break: keep-all;
  line-break: auto;
  overflow-wrap: normal;
}

.share-guide .nobr {
  white-space: nowrap;
  word-break: keep-all;
  overflow-wrap: normal;
}