/* ============================================================
   VKFU 官网 · 现代轻奢设计系统 v2.0
   设计语言：浅色纯净 + VKFU 蓝渐变 + 玻璃拟态 + 深色对比
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色板 */
  --bg: #F4F6FA;            /* 页面底色 · 冷灰白 */
  --bg-soft: #ECF0F7;       /* 浅区块底 */
  --surface: #FFFFFF;       /* 卡片表面 */
  --surface-glass: rgba(255,255,255,.72);
  --ink: #0B1220;           /* 主文字 · 深墨 */
  --ink-2: #48536B;         /* 次级文字 */
  --ink-3: #8B94A8;         /* 弱文字 */
  --brand: #1A4FD9;         /* VKFU 蓝 */
  --brand-2: #5B7CFA;       /* 亮蓝 */
  --brand-3: #9DB4FF;       /* 浅蓝 */
  --brand-deep: #0E3AA8;    /* 深蓝 */
  --gold: #C9A96A;          /* 香槟金 · 点缀 */
  --gold-soft: #E9DCC3;
  --green: #1FA971;
  --red: #E05252;
  --line: rgba(11,18,32,.08);
  --line-strong: rgba(11,18,32,.14);
  /* 深色区块 */
  --dark-bg: #0A1120;
  --dark-2: #101A30;
  --dark-line: rgba(255,255,255,.08);
  /* 效果 */
  --shadow-sm: 0 2px 10px rgba(11,18,32,.05);
  --shadow: 0 12px 40px rgba(11,18,32,.08);
  --shadow-lg: 0 24px 70px rgba(11,18,32,.14);
  --shadow-brand: 0 14px 34px rgba(26,79,217,.28);
  --radius: 18px;
  --radius-lg: 26px;
  --radius-sm: 10px;
  --grad-brand: linear-gradient(135deg, #1A4FD9 0%, #5B7CFA 60%, #8FA8FF 100%);
  --grad-gold: linear-gradient(135deg, #D8BC84, #C9A96A);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --serif: "Songti SC", "STSong", "SimSun", serif;
}

/* ---------- Reset & 基础 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: rgba(26,79,217,.16); color: var(--brand-deep); }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- 通用区块 ---------- */
.section { padding: 104px 0; position: relative; }
.section-cream { background: var(--bg-soft); }
.section-dark { background: var(--dark-bg); color: #fff; }

.section-head { margin-bottom: 56px; }
.section-head-split {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 40px; flex-wrap: wrap;
}
.section-head-side { max-width: 460px; }
.section-head-side p { color: var(--ink-2); font-size: 15.5px; line-height: 1.9; margin-bottom: 14px; }

.section-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-top: 14px;
}
.section-title-light { font-size: clamp(30px, 4vw, 44px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; margin-top: 14px; }
.section-title-center { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.3; text-align: center; margin-top: 14px; }

.eyebrow { display: flex; align-items: center; gap: 12px; font-size: 12px; font-weight: 700; letter-spacing: .22em; color: var(--brand); text-transform: uppercase; }
.eyebrow-center { justify-content: center; }
.eyebrow-light { color: var(--brand-3); }
.eyebrow-line { width: 34px; height: 2px; background: var(--grad-brand); border-radius: 2px; flex: none; }
.eyebrow-light .eyebrow-line { background: var(--grad-gold); }

.lead { font-size: 16.5px; color: var(--ink-2); line-height: 2; margin: 22px 0 30px; }
.lead-light { font-size: 16.5px; color: rgba(255,255,255,.62); line-height: 2; margin: 22px 0 34px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: 999px;
  font-size: 15px; font-weight: 600; letter-spacing: .02em;
  transition: all .3s cubic-bezier(.4,0,.2,1);
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(26,79,217,.36); }
.btn-primary:active { transform: translateY(0); }
.btn-light { background: #fff; color: var(--brand-deep); box-shadow: 0 10px 30px rgba(0,0,0,.18); }
.btn-light:hover { transform: translateY(-2px); }
.btn-ghost-light { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.22); backdrop-filter: blur(8px); }
.btn-ghost-light:hover { background: rgba(255,255,255,.16); transform: translateY(-2px); }
.btn-sm { padding: 9px 20px; font-size: 13px; }
.btn-ghost {
  background: transparent; color: var(--ink); border: 1px solid var(--line-strong);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.play-mini {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--brand); color: #fff; font-size: 9px;
  flex: none;
}

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 15px; font-weight: 700; color: var(--brand);
  transition: gap .25s ease;
}
.link-arrow:hover { gap: 14px; }

/* ---------- 顶部公告条 ---------- */
.topbar {
  background: linear-gradient(90deg, #0A1120, #13224A 55%, #0A1120);
  color: rgba(255,255,255,.85);
  font-size: 13px;
  position: relative; z-index: 60;
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding-top: 9px; padding-bottom: 9px;
  letter-spacing: .04em;
}
.topbar-inner span:first-child { font-weight: 500; }
.topbar-meta { color: var(--gold); font-size: 12px; letter-spacing: .08em; }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  transition: transform .35s ease, box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 8px 30px rgba(11,18,32,.06); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; height: 76px;
}
.logo { display: flex; align-items: center; flex: none; }
.logo img { height: 34px; width: auto; }
.nav-links {
  display: flex; align-items: center; gap: 6px;
  list-style: none;
}
.nav-links a {
  padding: 9px 16px; border-radius: 999px;
  font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  transition: all .25s ease;
}
.nav-links a:hover { color: var(--brand); background: rgba(26,79,217,.07); }
.nav-links a.active { color: var(--brand); background: rgba(26,79,217,.1); font-weight: 700; }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.nav-cta {
  padding: 10px 22px; border-radius: 999px;
  background: var(--grad-brand); color: #fff;
  font-size: 13.5px; font-weight: 700;
  box-shadow: 0 8px 22px rgba(26,79,217,.25);
  transition: all .3s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(26,79,217,.35); }
.menu-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--bg-soft); padding: 0 11px;
}
.menu-toggle span { display: block; height: 2px; border-radius: 2px; background: var(--ink); transition: all .3s ease; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  background:
    radial-gradient(1100px 520px at 82% -10%, rgba(91,124,250,.16), transparent 60%),
    radial-gradient(800px 420px at 8% 12%, rgba(26,79,217,.1), transparent 55%),
    linear-gradient(180deg, #F8FAFF 0%, var(--bg) 100%);
  overflow: hidden;
  padding: 88px 0 110px;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(26,79,217,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,79,217,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(900px 500px at 70% 20%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 500px at 70% 20%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-glow {
  position: absolute; top: -180px; right: -120px;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(91,124,250,.2), transparent 65%);
  filter: blur(40px);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 64px; align-items: center;
}
.hero-text { padding-top: 8px; }
.hero h1 {
  font-size: clamp(40px, 5.4vw, 62px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin: 22px 0 0;
}
.hero h1 .serif-accent {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 500;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  padding-right: 4px;
}
.hero h1 .accent-line { position: relative; white-space: nowrap; }
.hero h1 .accent-line::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 10px;
  background: linear-gradient(90deg, rgba(26,79,217,.14), rgba(91,124,250,.05));
  border-radius: 4px; z-index: -1;
}
.hero-sub {
  font-size: 17px; color: var(--ink-2); line-height: 2;
  margin: 26px 0 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-meta {
  display: flex; align-items: center; gap: 26px;
  padding: 20px 26px; border-radius: var(--radius);
  background: var(--surface-glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  max-width: 460px;
}
.meta-item { display: flex; flex-direction: column; }
.meta-num { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); line-height: 1.1; }
.meta-num small { font-size: 13px; font-weight: 600; color: var(--brand); margin-left: 2px; }
.meta-label { font-size: 12px; color: var(--ink-3); margin-top: 3px; letter-spacing: .05em; }
.meta-divider { width: 1px; height: 38px; background: var(--line); }

/* HERO 视觉 */
.hero-visual { position: relative; }
.hero-frame {
  position: relative;
  background: linear-gradient(160deg, rgba(255,255,255,.96), rgba(244,247,252,.9));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 36px 34px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.hero-frame::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(480px 300px at 50% 0%, rgba(91,124,250,.1), transparent 65%);
  pointer-events: none;
}
.frame-corner {
  position: absolute; width: 22px; height: 22px;
  border-color: var(--brand); border-style: solid;
  z-index: 2; opacity: .85;
}
.frame-tl { top: 14px; left: 14px; border-width: 2px 0 0 2px; border-radius: 6px 0 0 0; }
.frame-tr { top: 14px; right: 14px; border-width: 2px 2px 0 0; border-radius: 0 6px 0 0; }
.frame-bl { bottom: 14px; left: 14px; border-width: 0 0 2px 2px; border-radius: 0 0 0 6px; }
.frame-br { bottom: 14px; right: 14px; border-width: 0 2px 2px 0; border-radius: 0 0 6px 0; }
.frame-tag {
  position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  font-size: 11.5px; font-weight: 800; letter-spacing: .3em;
  color: var(--brand);
  background: rgba(26,79,217,.08);
  border: 1px solid rgba(26,79,217,.2);
  padding: 7px 18px 7px 22px; border-radius: 999px;
  white-space: nowrap; z-index: 2;
}
.frame-stage { position: relative; height: 300px; display: flex; align-items: flex-end; justify-content: center; }
.stage-floor {
  position: absolute; bottom: 0; left: 10%; right: 10%;
  height: 56px;
  background: linear-gradient(180deg, rgba(26,79,217,.1), rgba(26,79,217,.03));
  border-radius: 50%;
  filter: blur(2px);
}
.stage-pole {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  width: 8px; height: 238px;
  background: linear-gradient(180deg, #D9DEE8, #9AA5BB);
  border-radius: 6px;
  box-shadow: 2px 4px 12px rgba(11,18,32,.14);
}
.stage-clamp {
  position: absolute; bottom: 196px; left: 50%; transform: translateX(-50%);
  width: 84px; height: 26px;
  background: linear-gradient(180deg, #1A4FD9, #0E3AA8);
  border-radius: 8px;
  box-shadow: 0 8px 20px rgba(26,79,217,.4);
}
.stage-arm {
  position: absolute; bottom: 196px; left: 50%;
  width: 130px; height: 6px;
  background: linear-gradient(90deg, #0E3AA8, #1A4FD9);
  border-radius: 4px;
  transform-origin: left center;
  transform: translateX(0) rotate(14deg);
  box-shadow: 0 4px 10px rgba(26,79,217,.3);
}
.stage-phone {
  position: absolute; bottom: 138px; left: 58%;
  width: 64px; height: 130px;
  background: linear-gradient(180deg, #141B2E, #0A1120);
  border-radius: 12px;
  border: 2px solid rgba(255,255,255,.25);
  box-shadow: 0 18px 40px rgba(11,18,32,.35);
  transform: rotate(14deg);
  display: flex; align-items: center; justify-content: center;
}
.phone-screen {
  width: 46px; height: 100px;
  background: linear-gradient(160deg, #5B7CFA, #1A4FD9 60%, #0E3AA8);
  border-radius: 7px;
  position: relative; overflow: hidden;
}
.phone-screen::after {
  content: ""; position: absolute; top: 8px; left: 8px; right: 8px; height: 26px;
  background: linear-gradient(180deg, rgba(255,255,255,.5), transparent);
  border-radius: 4px;
}
.stage-shadow {
  position: absolute; bottom: 24px; left: 40%; right: 12%;
  height: 16px; border-radius: 50%;
  background: radial-gradient(ellipse, rgba(11,18,32,.22), transparent 70%);
}
.frame-spec {
  position: relative; margin-top: 22px;
  display: grid; grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(255,255,255,.8);
}
.spec-row { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 13px 8px; }
.spec-row + .spec-row { border-left: 1px solid var(--line); }
.spec-row span { font-size: 11px; color: var(--ink-3); letter-spacing: .06em; }
.spec-row b { font-size: 13.5px; color: var(--ink); font-weight: 700; }

/* 悬浮标签 */
.hero-floating-tag {
  position: absolute;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface-glass);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 18px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  animation: floatY 5s ease-in-out infinite;
  z-index: 3;
}
.tag-1 { top: 26%; left: -30px; }
.tag-2 { bottom: 14%; right: 8px; animation-delay: 1.6s; }
.ft-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--grad-brand);
  box-shadow: 0 0 0 4px rgba(26,79,217,.14);
  flex: none;
}
.ft-title { font-size: 13.5px; font-weight: 700; color: var(--ink); line-height: 1.3; }
.ft-sub { font-size: 11.5px; color: var(--ink-3); line-height: 1.3; }
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

.hero-scroll {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--ink-3); font-size: 12px; letter-spacing: .18em;
}
.scroll-line {
  width: 1px; height: 42px;
  background: linear-gradient(180deg, var(--brand-2), transparent);
  position: relative; overflow: hidden;
}
.scroll-line::after {
  content: ""; position: absolute; top: -100%; left: 0; width: 100%; height: 50%;
  background: #fff; animation: scrollDrop 2.2s ease-in-out infinite;
}
@keyframes scrollDrop { 0% { top: -60%; } 100% { top: 120%; } }

/* ---------- 品牌信任条 ---------- */
.trustbar {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  padding: 30px 0;
}
.trust-title {
  text-align: center; font-size: 12px; letter-spacing: .24em;
  color: var(--ink-3); font-weight: 600; margin-bottom: 22px;
}
.trust-logos {
  display: flex; align-items: center; justify-content: center;
  gap: clamp(22px, 4vw, 56px); flex-wrap: wrap;
}
.trust-logo {
  font-size: 13.5px; font-weight: 800; letter-spacing: .18em;
  color: #7A8598;
  transition: color .3s ease, transform .3s ease;
  cursor: default;
  background: rgba(26,79,217,.04);
  border: 1px solid var(--line);
  padding: 10px 22px;
  border-radius: 999px;
}
.trust-logo:hover { color: var(--brand); border-color: rgba(26,79,217,.3); transform: translateY(-2px); }

/* ---------- 产品矩阵 ---------- */
.collection-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.collection-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .4s cubic-bezier(.4,0,.2,1), box-shadow .4s ease, border-color .3s ease;
  display: flex; flex-direction: column;
}
.collection-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(26,79,217,.35);
}
.collection-card-large { grid-row: span 2; background: linear-gradient(165deg, #101A30 0%, #0A1120 100%); color: #fff; border-color: transparent; }
.collection-card-large:hover { border-color: rgba(91,124,250,.5); }
.cc-badge {
  position: absolute; top: 18px; right: 18px; z-index: 3;
  font-size: 10.5px; font-weight: 800; letter-spacing: .16em;
  color: #1B1B1B;
  background: var(--grad-gold);
  padding: 6px 14px; border-radius: 999px;
  box-shadow: 0 6px 18px rgba(201,169,106,.4);
}
.cc-image { position: relative; height: 218px; display: flex; align-items: center; justify-content: center; overflow: hidden; background: var(--bg-soft); }
.collection-card-large .cc-image { background: rgba(255,255,255,.04); height: 300px; }
.cc-mock { position: relative; width: 100%; height: 100%; }
/* 桌面款 mock */
.m-base { position: absolute; bottom: 46px; left: 50%; transform: translateX(-50%); width: 120px; height: 10px; border-radius: 8px; background: linear-gradient(90deg, #AEB8CC, #D5DBE6); box-shadow: 0 10px 20px rgba(11,18,32,.16); }
.m-pillar { position: absolute; bottom: 52px; left: 50%; transform: translateX(-50%); width: 7px; height: 92px; background: linear-gradient(180deg, #B9C2D6, #8792A9); border-radius: 5px; }
.m-arm { position: absolute; bottom: 118px; left: 50%; width: 96px; height: 5px; background: linear-gradient(90deg, #1A4FD9, #5B7CFA); border-radius: 4px; transform: rotate(-8deg); transform-origin: left center; box-shadow: 0 4px 10px rgba(26,79,217,.3); }
.m-screen { position: absolute; bottom: 88px; left: 62%; width: 48px; height: 92px; background: linear-gradient(180deg, #1C2440, #0A1120); border-radius: 9px; border: 2px solid rgba(255,255,255,.28); box-shadow: 0 14px 30px rgba(11,18,32,.3); transform: rotate(-8deg); }
/* 落地款 mock */
.m-floor-base { position: absolute; bottom: 38px; left: 50%; transform: translateX(-50%); width: 168px; height: 9px; border-radius: 9px; background: linear-gradient(90deg, #5A6378, #9AA5BB); box-shadow: 0 12px 24px rgba(0,0,0,.4); }
.m-floor-pole { position: absolute; bottom: 44px; left: 50%; transform: translateX(-50%); width: 6px; height: 208px; background: linear-gradient(180deg, #B9C2D6, #7A849B); border-radius: 4px; }
.m-floor-clamp { position: absolute; bottom: 200px; left: 50%; transform: translateX(-50%); width: 74px; height: 24px; background: linear-gradient(180deg, #5B7CFA, #1A4FD9); border-radius: 7px; box-shadow: 0 10px 24px rgba(91,124,250,.5); }
.m-floor-arm { position: absolute; bottom: 200px; left: 50%; width: 120px; height: 5px; background: linear-gradient(90deg, #1A4FD9, #8FA8FF); border-radius: 4px; transform: rotate(12deg); transform-origin: left center; box-shadow: 0 4px 12px rgba(91,124,250,.4); }
.m-floor-screen { position: absolute; bottom: 142px; left: 58%; width: 56px; height: 112px; background: linear-gradient(180deg, #2A3350, #141B2E); border-radius: 10px; border: 2px solid rgba(255,255,255,.25); box-shadow: 0 16px 36px rgba(0,0,0,.45); transform: rotate(12deg); }
/* 挂脖款 mock */
.m-neck-band { position: absolute; top: 52px; left: 50%; transform: translateX(-50%); width: 132px; height: 8px; border-radius: 20px; background: linear-gradient(90deg, #1A4FD9, #5B7CFA); box-shadow: 0 6px 16px rgba(26,79,217,.35); }
.m-neck-clamp { position: absolute; top: 66px; left: 50%; transform: translateX(-50%); width: 34px; height: 44px; background: linear-gradient(180deg, #5B7CFA, #0E3AA8); border-radius: 8px; box-shadow: 0 10px 22px rgba(26,79,217,.4); }
.m-neck-screen { position: absolute; top: 108px; left: 50%; transform: translateX(-50%); width: 52px; height: 100px; background: linear-gradient(180deg, #1C2440, #0A1120); border-radius: 10px; border: 2px solid rgba(255,255,255,.28); box-shadow: 0 14px 30px rgba(11,18,32,.3); }
.cc-info { padding: 24px 26px 26px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.cc-no { font-size: 11px; font-weight: 700; letter-spacing: .2em; color: var(--brand); }
.collection-card-large .cc-no { color: var(--gold); }
.cc-info h3 { font-size: 21px; font-weight: 800; letter-spacing: -0.01em; }
.collection-card-large .cc-info h3 { color: #fff; }
.cc-info p { font-size: 14px; color: var(--ink-2); line-height: 1.8; flex: 1; }
.collection-card-large .cc-info p { color: rgba(255,255,255,.58); }
.cc-link { font-size: 14px; font-weight: 700; color: var(--brand); margin-top: 6px; }
.collection-card-large .cc-link { color: var(--gold); }

/* ---------- 工艺哲学 ---------- */
.craft-grid {
  display: grid; grid-template-columns: 1.1fr .9fr;
  gap: 72px; align-items: center;
}
.craft-list { display: flex; flex-direction: column; gap: 22px; margin-top: 34px; }
.craft-item {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 20px 24px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--dark-line);
  border-radius: var(--radius);
  transition: border-color .3s ease, background .3s ease, transform .3s ease;
}
.craft-item:hover { border-color: rgba(91,124,250,.45); background: rgba(91,124,250,.08); transform: translateX(6px); }
.craft-num {
  font-size: 13px; font-weight: 800; letter-spacing: .08em;
  color: var(--gold);
  background: rgba(201,169,106,.12);
  border: 1px solid rgba(201,169,106,.3);
  border-radius: 8px;
  padding: 5px 10px; flex: none;
}
.craft-item p { font-size: 13.5px; color: rgba(255,255,255,.64); line-height: 1.8; }
.craft-item h4 { font-size: 16.5px; font-weight: 700; color: #fff; margin-bottom: 5px; }
.craft-item:hover { border-color: rgba(91,124,250,.45); background: rgba(91,124,250,.08); transform: translateX(6px); }
.craft-visual { display: flex; justify-content: center; }
.craft-card {
  position: relative;
  width: 100%; max-width: 420px;
  background: linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  border: 1px solid var(--dark-line);
  border-radius: 30px;
  padding: 52px 40px 46px;
  overflow: hidden;
  text-align: center;
}
.craft-card::before {
  content: ""; position: absolute; top: -90px; left: 50%; transform: translateX(-50%);
  width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(91,124,250,.28), transparent 70%);
  filter: blur(30px);
}
.craft-circle {
  position: relative;
  width: 210px; height: 210px; margin: 0 auto 40px;
  border-radius: 50%;
  border: 1px dashed rgba(91,124,250,.5);
  display: flex; align-items: center; justify-content: center;
  animation: spinSlow 22s linear infinite;
}
.craft-circle::before {
  content: ""; position: absolute;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--grad-gold);
  box-shadow: 0 0 22px rgba(201,169,106,.7);
  top: -8px; left: 50%; transform: translateX(-50%);
}
.craft-circle::after {
  content: "VKFU";
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 800; letter-spacing: .3em;
  color: #fff;
  animation: spinSlow 22s linear infinite reverse;
}
@keyframes spinSlow { to { transform: rotate(360deg); } }
.craft-stat { position: relative; margin-top: 26px; }
.cs-num { font-size: 34px; font-weight: 900; letter-spacing: -0.02em; color: #fff; line-height: 1; }
.cs-num span { font-size: 15px; font-weight: 700; color: var(--gold); margin-left: 3px; }
.cs-label { font-size: 12.5px; color: rgba(255,255,255,.58); margin-top: 6px; letter-spacing: .06em; }

/* ---------- 安装视频引导 ---------- */
.video-feature {
  display: grid; grid-template-columns: .95fr 1.05fr;
  gap: 64px; align-items: center;
}
.vf-stats {
  display: flex; gap: 34px; margin-top: 34px;
  padding-top: 24px; border-top: 1px solid var(--line);
}
.vf-stats div { display: flex; flex-direction: column; gap: 2px; }
.vf-stats strong { font-size: 22px; font-weight: 800; color: var(--ink); }
.vf-stats span { font-size: 12px; color: var(--ink-3); }
.vf-player { position: relative; }
.vf-frame {
  position: relative;
  background: linear-gradient(160deg, #141B2E, #0A1120);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,.06);
}
.vf-frame::before {
  content: ""; position: absolute; inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(91,124,250,.5), transparent 40%, rgba(201,169,106,.35));
  z-index: -1;
}
.vf-screen {
  position: relative;
  aspect-ratio: 16 / 9;
  background: radial-gradient(600px 300px at 50% 0%, rgba(91,124,250,.18), transparent 60%), #0A1120;
  border-radius: 16px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.vf-product { position: relative; width: 100%; height: 100%; }
.vf-base { position: absolute; bottom: 26%; left: 50%; transform: translateX(-50%); width: 190px; height: 10px; border-radius: 10px; background: linear-gradient(90deg, #3A4663, #6B7790); box-shadow: 0 14px 30px rgba(0,0,0,.5); }
.vf-pole { position: absolute; bottom: 27%; left: 50%; transform: translateX(-50%); width: 7px; height: 150px; background: linear-gradient(180deg, #8B95AD, #4A546E); border-radius: 5px; }
.vf-clamp { position: absolute; bottom: 44%; left: 50%; transform: translateX(-50%); width: 90px; height: 28px; background: linear-gradient(180deg, #5B7CFA, #1A4FD9); border-radius: 9px; box-shadow: 0 12px 28px rgba(91,124,250,.5); }
.vf-phone { position: absolute; bottom: 34%; left: 55%; width: 62px; height: 126px; background: linear-gradient(180deg, #2A3350, #141B2E); border-radius: 12px; border: 2px solid rgba(255,255,255,.22); box-shadow: 0 18px 40px rgba(0,0,0,.5); transform: rotate(6deg); }
.vf-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  background: rgba(10,17,32,.55);
  backdrop-filter: blur(2px);
  cursor: pointer;
  transition: background .3s ease;
}
.vf-overlay:hover { background: rgba(10,17,32,.4); }
.vf-play {
  width: 62px; height: 62px; border-radius: 50%;
  background: rgba(255,255,255,.95);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
  transition: transform .3s ease;
}
.vf-overlay:hover .vf-play { transform: scale(1.08); }
.vf-title {
  position: absolute; left: 14px; right: 14px; bottom: 12px;
  font-size: 13px; font-weight: 600; color: rgba(255,255,255,.92);
  text-align: center;
  background: rgba(10,17,32,.55);
  padding: 6px 12px; border-radius: 8px;
  backdrop-filter: blur(4px);
}
.vf-duration {
  position: absolute; bottom: 14px; right: 16px;
  font-size: 11.5px; font-weight: 600; color: rgba(255,255,255,.75);
  background: rgba(0,0,0,.55); padding: 3px 9px; border-radius: 6px;
  font-variant-numeric: tabular-nums;
}
.vf-progress { position: absolute; left: 18px; right: 18px; bottom: 14px; height: 3px; border-radius: 3px; background: rgba(255,255,255,.16); }
.vf-progress-bar { height: 100%; width: 32%; border-radius: 3px; background: var(--grad-brand); }
.vf-thumb-row { display: flex; gap: 12px; margin-top: 16px; }
.vf-thumb {
  flex: 1;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 14px;
  font-size: 13px; font-weight: 600; color: var(--ink-2);
  transition: all .25s ease;
}
.vf-thumb.active { border-color: rgba(26,79,217,.5); background: rgba(26,79,217,.06); color: var(--brand); }
.vt-mini { width: 44px; height: 30px; border-radius: 6px; background: var(--bg-soft); flex: none; position: relative; overflow: hidden; }
.vt-mini.m-1::after, .vt-mini.m-2::after, .vt-mini.m-3::after {
  content: ""; position: absolute; inset: 0;
  background-size: 6px 6px;
  background-image: linear-gradient(rgba(26,79,217,.14) 1px, transparent 1px), linear-gradient(90deg, rgba(26,79,217,.14) 1px, transparent 1px);
}

/* ---------- 用户证言 ---------- */
.testimonial-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.testimonial {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 32px 30px;
  transition: transform .35s ease, box-shadow .35s ease;
  display: flex; flex-direction: column;
}
.testimonial:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.testimonial-featured {
  background: linear-gradient(165deg, #101A30, #0A1120);
  border-color: transparent;
  color: #fff;
}
.t-quote {
  font-family: Georgia, serif;
  font-size: 58px; line-height: 1; height: 40px;
  color: var(--brand-2);
  margin-bottom: 8px;
}
.testimonial-featured .t-quote { color: var(--gold); }
.testimonial p { font-size: 14.5px; line-height: 1.95; color: var(--ink-2); flex: 1; }
.testimonial-featured p { color: rgba(255,255,255,.68); }
.t-user { display: flex; align-items: center; gap: 14px; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.testimonial-featured .t-user { border-top-color: var(--dark-line); }
.t-avatar {
  width: 44px; height: 44px; border-radius: 50%; flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; color: #fff;
}
.t-a-1 { background: linear-gradient(135deg, #5B7CFA, #1A4FD9); }
.t-a-2 { background: linear-gradient(135deg, #D8BC84, #B08D4F); }
.t-a-3 { background: linear-gradient(135deg, #7CC4A8, #1FA971); }
.t-name { font-size: 14.5px; font-weight: 700; color: var(--ink); }
.testimonial-featured .t-name { color: #fff; }
.t-role { font-size: 12px; color: var(--ink-3); margin-top: 1px; }
.testimonial-featured .t-role { color: rgba(255,255,255,.5); }

/* ---------- 服务承诺 ---------- */
.promise-grid {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 18px;
}
.promise {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 22px 26px;
  text-align: center;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.promise:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(26,79,217,.3); }
.promise-icon {
  width: 58px; height: 58px; margin: 0 auto 16px;
  border-radius: 16px;
  background: rgba(26,79,217,.08);
  color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  transition: all .3s ease;
}
.promise:hover .promise-icon { background: var(--grad-brand); color: #fff; box-shadow: var(--shadow-brand); }
.promise h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 7px; }
.promise p { font-size: 12.5px; color: var(--ink-3); line-height: 1.7; }

/* ---------- CTA ---------- */
.cta-section {
  position: relative;
  background:
    radial-gradient(900px 480px at 85% 10%, rgba(91,124,250,.22), transparent 60%),
    radial-gradient(700px 420px at 5% 90%, rgba(201,169,106,.1), transparent 55%),
    var(--dark-bg);
  overflow: hidden;
  padding: 110px 0;
}
.cta-section::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(800px 400px at 70% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(800px 400px at 70% 30%, #000 20%, transparent 75%);
}
.cta-inner {
  position: relative;
  display: grid; grid-template-columns: 1.15fr .85fr;
  gap: 72px; align-items: center;
}
.cta-text h2 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.28;
  color: #fff; margin-top: 16px;
}
.cta-text p { font-size: 16px; color: rgba(255,255,255,.6); line-height: 2; margin: 20px 0 34px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-card {
  position: relative;
  background: linear-gradient(160deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid var(--dark-line);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  backdrop-filter: blur(12px);
  overflow: hidden;
}
.cta-card::before {
  content: ""; position: absolute; top: -70px; right: -70px;
  width: 190px; height: 190px; border-radius: 50%;
  background: radial-gradient(circle, rgba(91,124,250,.3), transparent 70%);
  filter: blur(24px);
}
.cta-card-line { width: 46px; height: 3px; border-radius: 3px; background: var(--grad-gold); margin-bottom: 24px; }
.cta-card-title { font-size: 19px; font-weight: 800; color: #fff; }
.cta-card-sub { font-size: 12px; letter-spacing: .1em; color: rgba(255,255,255,.45); margin-top: 5px; }
.cta-card-divider { height: 1px; background: var(--dark-line); margin: 24px 0; }
.cta-card-info { display: flex; flex-direction: column; gap: 13px; position: relative; }
.cta-card-info div { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.cta-card-info span { font-size: 12.5px; color: rgba(255,255,255,.45); }
.cta-card-info b { font-size: 13.5px; color: rgba(255,255,255,.9); font-weight: 600; text-align: right; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,.72);
  padding: 76px 0 0;
  position: relative;
}
.site-footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(91,124,250,.5), rgba(201,169,106,.4), transparent);
}
.footer-top {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1.3fr;
  gap: 44px;
  padding-bottom: 52px;
}
.footer-brand .footer-logo { height: 34px; width: auto; margin-bottom: 18px; }
.footer-tagline { font-size: 14.5px; color: rgba(255,255,255,.55); margin-bottom: 14px; }
.footer-company { font-size: 12px; color: rgba(255,255,255,.35); line-height: 1.9; }
.footer-col h6 {
  font-size: 13px; font-weight: 700; letter-spacing: .1em;
  color: #fff; margin-bottom: 18px;
}
.footer-col a, .footer-col p {
  display: block; font-size: 13.5px; color: rgba(255,255,255,.55);
  line-height: 2.2; transition: color .25s ease, transform .25s ease;
}
.footer-col a:hover { color: var(--brand-3); transform: translateX(4px); }
.footer-bottom {
  border-top: 1px solid var(--dark-line);
  padding: 22px 0;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap;
  font-size: 12px; color: rgba(255,255,255,.35);
}

/* ---------- 子页通用 ---------- */
.page-hero {
  position: relative;
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(91,124,250,.16), transparent 60%),
    linear-gradient(180deg, #F8FAFF 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
  padding: 84px 0 66px;
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(26,79,217,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(26,79,217,.04) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(700px 320px at 75% 10%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(700px 320px at 75% 10%, #000 30%, transparent 75%);
}
.page-hero .container { position: relative; }
.page-hero .container::after {
  content: "";
  position: absolute; right: 7%; top: 50%; transform: translateY(-50%);
  width: 210px; height: 210px; border-radius: 50%;
  border: 1px dashed rgba(26,79,217,.28);
  background: radial-gradient(circle, rgba(26,79,217,.07) 0%, transparent 68%);
  pointer-events: none;
}
.page-hero .container::before {
  content: "";
  position: absolute; right: calc(7% + 84px); top: 50%; transform: translateY(-50%);
  width: 42px; height: 42px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(91,124,250,.28), rgba(26,79,217,.12));
  border: 1px solid rgba(26,79,217,.3);
  pointer-events: none;
}
.page-hero h1 {
  font-size: clamp(32px, 4.4vw, 48px);
  font-weight: 900; letter-spacing: -0.02em; line-height: 1.2;
  margin-top: 18px;
}
.page-hero p {
  font-size: 16px; color: var(--ink-2); line-height: 1.9;
  margin-top: 12px; max-width: 560px;
}

/* 筛选栏 */
.filter-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 36px;
  padding: 8px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  width: fit-content;
  max-width: 100%;
}
.filter-btn {
  padding: 10px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 600; color: var(--ink-2);
  transition: all .25s ease;
}
.filter-btn:hover { color: var(--brand); }
.filter-btn.active {
  background: var(--grad-brand); color: #fff;
  box-shadow: 0 6px 18px rgba(26,79,217,.3);
}

/* ---------- 产品页 ---------- */
.product-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.product-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .35s ease, box-shadow .35s ease, border-color .3s ease;
}
.product-item:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(26,79,217,.32);
}
.pi-visual {
  position: relative; height: 240px;
  background: var(--bg-soft);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.pi-visual::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(340px 200px at 50% 20%, rgba(91,124,250,.1), transparent 65%);
  pointer-events: none;
}
.pi-visual.has-image::after { display: none; }
.pi-info { padding: 22px 24px 24px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.pi-info h3 { font-size: 18px; font-weight: 800; }
.pi-info p { font-size: 13.5px; color: var(--ink-2); line-height: 1.8; flex: 1; }
.pi-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-size: 11px; font-weight: 600;
  color: var(--brand);
  background: rgba(26,79,217,.08);
  border: 1px solid rgba(26,79,217,.18);
  padding: 3px 10px; border-radius: 999px;
}
.pi-actions { display: flex; gap: 10px; margin-top: 8px; }

/* 产品 mock 视觉（CSS 绘制） */
.v-desk-stand {
  position: absolute; bottom: 58px; left: 50%; transform: translateX(-50%);
  width: 130px; height: 11px; border-radius: 9px;
  background: linear-gradient(90deg, #AEB8CC, #D5DBE6);
  box-shadow: 0 10px 22px rgba(11,18,32,.16);
}
.v-desk-phone {
  position: absolute; bottom: 120px; left: 50%; transform: translateX(-50%);
  width: 52px; height: 100px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 10px; border: 2px solid rgba(255,255,255,.28);
  box-shadow: 0 16px 34px rgba(11,18,32,.3);
}
.v-floor-pole {
  position: absolute; bottom: 52px; left: 50%; transform: translateX(-50%);
  width: 7px; height: 150px;
  background: linear-gradient(180deg, #9AA5BB, #6B7790); border-radius: 4px;
}
.v-floor-base {
  position: absolute; bottom: 46px; left: 50%; transform: translateX(-50%);
  width: 170px; height: 9px; border-radius: 9px;
  background: linear-gradient(90deg, #4E586E, #8B95AD);
  box-shadow: 0 12px 24px rgba(11,18,32,.22);
}
.v-floor-arm {
  position: absolute; bottom: 172px; left: 50%;
  width: 118px; height: 5px;
  background: linear-gradient(90deg, #1A4FD9, #8FA8FF); border-radius: 4px;
  transform: rotate(10deg); transform-origin: left center;
  box-shadow: 0 4px 12px rgba(26,79,217,.3);
}
.v-floor-phone {
  position: absolute; bottom: 118px; left: 57%;
  width: 52px; height: 104px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 10px; border: 2px solid rgba(255,255,255,.28);
  box-shadow: 0 16px 34px rgba(11,18,32,.3);
  transform: rotate(10deg);
}
.v-neck-band {
  position: absolute; top: 64px; left: 50%; transform: translateX(-50%);
  width: 136px; height: 9px; border-radius: 20px;
  background: linear-gradient(90deg, #1A4FD9, #5B7CFA);
  box-shadow: 0 6px 16px rgba(26,79,217,.35);
}
.v-neck-phone {
  position: absolute; top: 112px; left: 50%; transform: translateX(-50%);
  width: 54px; height: 104px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 10px; border: 2px solid rgba(255,255,255,.28);
  box-shadow: 0 16px 34px rgba(11,18,32,.3);
}

/* ---------- 视频页 ---------- */
.video-grid {
  display: flex; flex-direction: column;
  gap: 40px;
}
.video-group-title {
  display: flex; align-items: center; gap: 12px;
  font-size: 21px; font-weight: 800; letter-spacing: .02em;
  margin: 0 0 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(26,79,217,.14);
}
.video-group-title::before {
  content: ""; width: 6px; height: 22px; border-radius: 3px;
  background: linear-gradient(180deg, #1A4FD9, #3B6FE8);
}
.video-group-count {
  font-size: 12.5px; font-weight: 600; color: #6B7790;
  background: rgba(26,79,217,.08);
  padding: 3px 10px; border-radius: 20px;
}
.video-grid-inner {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.video-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform .35s ease, box-shadow .35s ease, border-color .3s ease;
}
.video-item:hover { transform: translateY(-7px); box-shadow: var(--shadow-lg); border-color: rgba(26,79,217,.32); }
.video-thumb {
  position: relative; height: 200px;
  background: linear-gradient(150deg, var(--bg-soft), #E3E9F4);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(10,17,32,.25);
  transition: background .3s ease;
}
.play-overlay::before {
  content: "";
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,255,255,.92);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.video-item:hover .play-overlay { background: rgba(10,17,32,.4); }
.video-item.has-video .play-overlay { display: none; }
.video-thumb video { width: 100%; height: 100%; object-fit: contain; background: #0A1120; }
.video-item h4 { font-size: 15.5px; font-weight: 700; padding: 16px 20px 4px; }
.video-item p { font-size: 13px; color: var(--ink-3); padding: 0 20px 18px; line-height: 1.7; }

/* 视频占位场景 */
.vt-scene { position: relative; width: 100%; height: 100%; }
.vt-phone {
  position: absolute; top: 42px; left: 50%; transform: translateX(-50%);
  width: 46px; height: 92px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 9px; border: 2px solid rgba(255,255,255,.26);
  box-shadow: 0 14px 30px rgba(11,18,32,.28);
}
.vt-stand {
  position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
  width: 110px; height: 9px; border-radius: 8px;
  background: linear-gradient(90deg, #AEB8CC, #D5DBE6);
  box-shadow: 0 10px 20px rgba(11,18,32,.16);
}
.vt-floor-base {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  width: 150px; height: 8px; border-radius: 8px;
  background: linear-gradient(90deg, #4E586E, #8B95AD);
}
.vt-floor-pole {
  position: absolute; bottom: 42px; left: 50%; transform: translateX(-50%);
  width: 6px; height: 130px;
  background: linear-gradient(180deg, #9AA5BB, #6B7790); border-radius: 4px;
}
.vt-floor-phone {
  position: absolute; bottom: 108px; left: 52%;
  width: 46px; height: 90px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 9px; border: 2px solid rgba(255,255,255,.26);
  transform: rotate(8deg);
}
.vt-neck-band {
  position: absolute; top: 52px; left: 50%; transform: translateX(-50%);
  width: 120px; height: 8px; border-radius: 20px;
  background: linear-gradient(90deg, #1A4FD9, #5B7CFA);
  box-shadow: 0 6px 14px rgba(26,79,217,.32);
}
.vt-neck-phone {
  position: absolute; top: 94px; left: 50%; transform: translateX(-50%);
  width: 48px; height: 94px;
  background: linear-gradient(180deg, #1C2440, #0A1120);
  border-radius: 9px; border: 2px solid rgba(255,255,255,.26);
  box-shadow: 0 14px 30px rgba(11,18,32,.28);
}

.video-note {
  margin-top: 40px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius);
  padding: 26px 30px;
}
.video-note h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.video-note p { font-size: 13.5px; color: var(--ink-2); line-height: 1.9; }
.video-note code {
  background: rgba(26,79,217,.08); color: var(--brand-deep);
  padding: 2px 8px; border-radius: 6px; font-size: 12.5px;
}
.empty-hint { color: var(--ink-3); }

/* ---------- 关于页 ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 64px; align-items: center;
}
.about-text .lead { margin-bottom: 26px; }
.about-text p { font-size: 15px; color: var(--ink-2); line-height: 2; margin-bottom: 16px; }
.about-visual {
  position: relative;
  background: linear-gradient(160deg, #101A30, #0A1120);
  border-radius: var(--radius-lg);
  padding: 44px 36px;
  color: #fff;
  overflow: hidden;
}
.about-visual::before {
  content: ""; position: absolute; top: -60px; right: -60px;
  width: 200px; height: 200px; border-radius: 50%;
  background: radial-gradient(circle, rgba(91,124,250,.3), transparent 70%);
  filter: blur(28px);
}
.av-brand { font-size: 15px; font-weight: 800; letter-spacing: .28em; color: var(--gold); margin-bottom: 22px; }
.av-stat { display: flex; align-items: baseline; gap: 10px; padding: 18px 0; border-bottom: 1px solid var(--dark-line); position: relative; }
.av-stat:last-child { border-bottom: none; }
.av-num { font-size: 40px; font-weight: 900; letter-spacing: -0.02em; }
.av-num small { font-size: 15px; color: var(--gold); font-weight: 700; }
.av-label { font-size: 13px; color: rgba(255,255,255,.5); }
.av-desc { font-size: 12px; color: rgba(255,255,255,.4); margin-left: auto; text-align: right; max-width: 140px; }
.about-values {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  margin-top: 56px;
}
.value {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.value:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.value .value-ico {
  width: 50px; height: 50px; border-radius: 14px;
  background: rgba(26,79,217,.08); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.value h4 { font-size: 16.5px; font-weight: 700; margin-bottom: 8px; }
.value p { font-size: 13px; color: var(--ink-2); line-height: 1.8; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid; grid-template-columns: .9fr 1.1fr;
  gap: 56px; align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 0; }
.ci-item {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.ci-item:first-child { padding-top: 0; }
.ci-ico {
  width: 46px; height: 46px; border-radius: 13px; flex: none;
  background: rgba(26,79,217,.08); color: var(--brand);
  display: flex; align-items: center; justify-content: center;
}
.ci-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.ci-item p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.ci-item a { color: var(--brand); font-weight: 600; }
.ci-item a:hover { text-decoration: underline; }
.contact-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 36px 34px;
  box-shadow: var(--shadow);
}
.contact-form h3 { font-size: 20px; font-weight: 800; margin-bottom: 24px; }
.form-row { display: flex; gap: 14px; margin-bottom: 16px; }
.form-row > div { flex: 1; }
.form-row label { flex: 1; display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.contact-form label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 7px; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 13px 16px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 14px; color: var(--ink);
  background: var(--bg);
  transition: border-color .25s ease, box-shadow .25s ease;
  outline: none;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(26,79,217,.1);
  background: #fff;
}
.contact-form textarea { resize: vertical; min-height: 120px; }

/* ---------- 页脚内子页补充 ---------- */
.footer-col p { margin: 0; }
.footer-bottom-meta { font-size: 11.5px; }

/* ---------- 杂项补充 ---------- */
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.title-line { display: block; }
.section-head p { color: var(--ink-2); font-size: 15.5px; margin-top: 10px; max-width: 560px; }
.section-light { background: var(--surface); }

/* 关于页补充 */
.ab-card {
  display: flex; align-items: baseline; gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--dark-line);
  position: relative;
}
.ab-card:first-child { padding-top: 0; }
.ab-card:last-child { border-bottom: none; padding-bottom: 0; }
.ab-num { font-size: 38px; font-weight: 900; letter-spacing: -0.02em; color: #fff; line-height: 1; min-width: 120px; }
.ab-card > div:last-child { font-size: 13.5px; color: rgba(255,255,255,.55); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-num {
  display: inline-block;
  font-size: 12px; font-weight: 800; letter-spacing: .1em;
  color: var(--brand);
  background: rgba(26,79,217,.08);
  border: 1px solid rgba(26,79,217,.18);
  border-radius: 8px;
  padding: 4px 10px;
  margin-bottom: 14px;
}

/* 联系页补充 */
.info-row {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.info-row:first-of-type { padding-top: 8px; }
.info-icon {
  width: 46px; height: 46px; border-radius: 13px; flex: none;
  background: rgba(26,79,217,.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
}
.info-row h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.info-row p { font-size: 13.5px; color: var(--ink-2); line-height: 1.75; }
.form-hint { font-size: 13.5px; color: var(--ink-3); margin: -8px 0 22px; }
.form-tip { font-size: 12.5px; color: var(--ink-3); text-align: center; margin-top: 14px; }
.btn-block { width: 100%; }
.contact-form label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 16px; }
.contact-form label input, .contact-form label textarea, .contact-form label select { margin-top: 7px; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 13px 16px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 14px; color: var(--ink);
  background: var(--bg);
  transition: border-color .25s ease, box-shadow .25s ease;
  outline: none;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(26,79,217,.1);
  background: #fff;
}
.contact-form textarea { resize: vertical; min-height: 120px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { max-width: 560px; margin: 0 auto; width: 100%; }
  .video-feature { grid-template-columns: 1fr; gap: 48px; }
  .craft-grid { grid-template-columns: 1fr; gap: 48px; }
  .cta-inner { grid-template-columns: 1fr; gap: 48px; }
  .promise-grid { grid-template-columns: repeat(3, 1fr); }
  .collection-grid { grid-template-columns: repeat(2, 1fr); }
  .collection-card-large { grid-row: auto; }
  .collection-card-large .cc-image { height: 218px; }
  /* 落地支架 mock 适配 218px 容器，避免顶部被裁切 */
  .m-floor-pole { height: 160px; }
  .m-floor-clamp { bottom: 160px; }
  .m-floor-arm { bottom: 160px; }
  .m-floor-screen { bottom: 100px; height: 100px; }
  .product-grid, .video-grid-inner { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-top { grid-template-columns: 1fr 1fr 1fr; }
  .about-values { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .menu-toggle { display: flex; }
  .cc-badge { font-size: 9.5px; padding: 5px 11px; right: 12px; top: 12px; letter-spacing: .1em; }
  .nav-links {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    padding: 14px 24px 22px;
    gap: 4px;
    transform: translateY(-12px);
    opacity: 0; pointer-events: none;
    transition: all .3s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 16px; font-size: 15.5px; }
  .nav-cta { display: none; }
  .topbar-meta { display: none; }
  .topbar-inner { justify-content: center; text-align: center; }
  .hero { padding: 64px 0 84px; }
  .page-hero .container::before, .page-hero .container::after { display: none; }
  .hero-scroll { display: none; }
  .tag-1 { left: 0; top: 12%; }
  .tag-2 { right: 0; }
  .frame-stage { height: 240px; }
  .promise-grid { grid-template-columns: repeat(2, 1fr); }
  .collection-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .about-values { grid-template-columns: 1fr; }
  .section-head-split { flex-direction: column; align-items: flex-start; gap: 20px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .filter-bar { border-radius: 16px; width: 100%; justify-content: center; }
  .form-row { flex-direction: column; }
}

@media (max-width: 520px) {
  .container { padding: 0 20px; }
  .product-grid, .video-grid-inner { grid-template-columns: 1fr; }
  .promise-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .vf-stats { gap: 22px; flex-wrap: wrap; }
  .frame-spec { grid-template-columns: repeat(3, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .hero-meta { flex-wrap: wrap; gap: 18px; padding: 18px; }
  .meta-divider { display: none; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
}

/* ===== 多款式图 & 视频入口位置 ===== */
.pi-main { display: block; }
.pi-thumbs { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.pi-thumb {
  width: 48px; height: 48px; border-radius: 8px; object-fit: cover;
  border: 2px solid var(--line); cursor: pointer; background: #EEF2F9; transition: border-color .15s, box-shadow .15s;
}
.pi-thumb:hover { border-color: var(--brand, #1A4FD9); }
.pi-thumb.active { border-color: var(--brand, #1A4FD9); box-shadow: 0 0 0 2px rgba(26,79,217,.16); }
.pi-video-badge {
  position: absolute; top: 12px; right: 12px; z-index: 3;
  background: rgba(26,79,217,.94); color: #fff; font-size: 12px; font-weight: 600;
  padding: 6px 12px; border-radius: 999px; display: inline-flex; align-items: center; gap: 5px;
  text-decoration: none; box-shadow: 0 6px 16px rgba(11,18,32,.28);
}
.pi-video-badge:hover { background: #1640b8; }
.pi-video-below {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 6px;
  color: var(--brand, #1A4FD9); font-weight: 600; font-size: 13px; text-decoration: none;
}
.pi-video-below:hover { text-decoration: underline; }