/* ============================================================
   集一欧 GEO · www.geosz.cn
   暖墨黑 + 香槟金 设计系统（高级质感版）
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #0c0a07;
  --bg-alt: #100d09;
  --surface: rgba(255, 244, 224, 0.032);
  --surface-strong: rgba(255, 244, 224, 0.06);
  --border: rgba(240, 228, 200, 0.10);
  --border-strong: rgba(240, 228, 200, 0.18);

  --text: #f4eee1;
  --text-2: #b3aa97;
  --text-3: #7e7666;

  --gold: #d4af6a;
  --gold-bright: #eacf9b;
  --gold-deep: #a98247;
  --copper: #c98a5a;
  --bronze: #bea06e;
  --grad: linear-gradient(120deg, #eacf9b 0%, #d4af6a 48%, #b08d4f 100%);
  --grad-soft: linear-gradient(120deg, rgba(234, 207, 155, 0.10), rgba(176, 141, 79, 0.10));

  --on-gold: #1c1608;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;

  --shadow-glow: 0 0 24px rgba(212, 175, 106, 0.22);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.45);

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Segoe UI", sans-serif;

  --header-h: 72px;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

::selection { background: rgba(212, 175, 106, 0.35); color: #fff; }

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}
.container-narrow { width: min(860px, 100% - 48px); }

/* ---------- 背景装饰 ---------- */
.bg-decor { position: fixed; inset: 0; z-index: -1; pointer-events: none; }

.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 244, 224, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 244, 224, 0.028) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 30%, transparent 75%);
}

.bg-orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.42; }
.bg-orb--gold   { width: 520px; height: 520px; top: -160px; left: -120px; background: radial-gradient(circle, rgba(212, 175, 106, 0.20), transparent 65%); }
.bg-orb--amber  { width: 640px; height: 640px; top: 12%; right: -220px; background: radial-gradient(circle, rgba(190, 160, 110, 0.16), transparent 65%); }
.bg-orb--copper { width: 700px; height: 700px; top: 55%; left: 30%; background: radial-gradient(circle, rgba(201, 138, 90, 0.10), transparent 65%); }

/* ---------- 文字渐变 ---------- */
.text-grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  background: var(--grad);
  color: var(--on-gold);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 34px rgba(212, 175, 106, 0.45); }

.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-strong); border-color: rgba(240, 228, 200, 0.32); transform: translateY(-2px); }

.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 15px 30px; font-size: 16px; }
.btn-block { width: 100%; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(12, 10, 7, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { display: grid; place-items: center; filter: drop-shadow(0 0 12px rgba(212, 175, 106, 0.35)); }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 18px; letter-spacing: 0.5px; }
.brand-text em {
  font-style: normal;
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 1.5px;
}

.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  padding: 8px 13px;
  font-size: 14.5px;
  color: var(--text-2);
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-link.is-active { color: var(--text); }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}

.header-actions { display: flex; align-items: center; gap: 12px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px; height: 42px;
  padding: 10px 9px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--text); border-radius: 2px; transition: transform 0.25s ease, opacity 0.25s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 72px) 0 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 56px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.pulse-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 0 rgba(212, 175, 106, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(212, 175, 106, 0.55); }
  70%  { box-shadow: 0 0 0 10px rgba(212, 175, 106, 0); }
  100% { box-shadow: 0 0 0 0 rgba(212, 175, 106, 0); }
}

.hero-title {
  font-size: clamp(38px, 5.2vw, 60px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.5px;
  margin-bottom: 22px;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-2);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 10px 28px; }
.hero-trust li {
  display: flex; align-items: baseline; gap: 7px;
  font-size: 13.5px;
  color: var(--text-3);
}
.hero-trust strong {
  font-size: 19px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- AI 对话演示窗 ---------- */
.hero-visual { perspective: 1200px; }

.chat-window {
  background: linear-gradient(160deg, rgba(255, 244, 224, 0.06), rgba(255, 244, 224, 0.018));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), 0 0 80px rgba(212, 175, 106, 0.10);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transform: rotateY(-4deg) rotateX(2deg);
  transition: transform 0.6s ease;
}
.chat-window:hover { transform: rotateY(0) rotateX(0); }

.chat-titlebar {
  display: flex; align-items: center; gap: 7px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 244, 224, 0.03);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-r { background: #ff5f57; } .dot-y { background: #febc2e; } .dot-g { background: #28c840; }
.chat-title { margin-left: 8px; font-size: 12.5px; color: var(--text-3); letter-spacing: 1px; }

.chat-body { padding: 22px 20px; display: flex; flex-direction: column; gap: 16px; min-height: 240px; }

.chat-msg { display: flex; gap: 10px; align-items: flex-start; opacity: 0; transform: translateY(10px); animation: msgIn 0.5s ease forwards; }
.chat-msg--user { flex-direction: row-reverse; animation-delay: 0.6s; }
.chat-msg--ai { animation-delay: 1.1s; }
@keyframes msgIn { to { opacity: 1; transform: none; } }

.chat-avatar {
  flex: none;
  width: 30px; height: 30px;
  border-radius: 9px;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 700;
}
.chat-avatar--user { background: rgba(255, 244, 224, 0.10); color: var(--text-2); }
.chat-avatar--ai { background: var(--grad); color: var(--on-gold); }

.chat-msg p {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.65;
}
.chat-msg--user p { background: var(--surface-strong); border-top-right-radius: 4px; }
.chat-msg--ai p { background: rgba(212, 175, 106, 0.10); border: 1px solid rgba(212, 175, 106, 0.25); border-top-left-radius: 4px; }

.chat-bubble { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.chat-typing::after { content: "▍"; color: var(--gold); animation: blink 0.9s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.chat-cite {
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  font-size: 12px !important;
  color: var(--gold) !important;
  background: rgba(212, 175, 106, 0.08) !important;
  border: 1px solid rgba(212, 175, 106, 0.25) !important;
  border-radius: 999px !important;
  padding: 5px 12px !important;
  align-self: flex-start;
}

.chat-input {
  display: flex; align-items: center; justify-content: space-between;
  margin: 4px 20px 20px;
  padding: 11px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-3);
  background: rgba(0, 0, 0, 0.25);
}
.chat-send {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad);
  color: var(--on-gold);
}

/* ---------- 平台跑马灯 ---------- */
.marquee {
  margin-top: 56px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track { display: flex; width: max-content; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }

.marquee-group { display: flex; gap: 44px; padding-right: 44px; }

.pf-chip {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 14.5px; font-weight: 600;
  color: var(--text-2);
  white-space: nowrap;
}

/* 平台标识色块（自绘通用图形，规避商标图） */
.pf-ico {
  width: 20px; height: 20px;
  border-radius: 6px;
  flex: none;
  position: relative;
  background: var(--surface-strong);
  border: 1px solid var(--border);
}
.pf-ico::after {
  content: "";
  position: absolute; inset: 5px;
  border-radius: 3px;
  background: currentColor;
  opacity: 0.9;
}
.pf-ico--db { color: #3b82f6; }
.pf-ico--ds { color: #4f7cff; }
.pf-ico--yb { color: #22c55e; }
.pf-ico--km { color: #a3a3a3; }
.pf-ico--wx { color: #f59e0b; }
.pf-ico--qw { color: #8b5cf6; }
.pf-ico--cg { color: #10a37f; }
.pf-ico--gm { color: #4285f4; }
.pf-ico--pp { color: #20b8cd; }
.pf-ico--ao { color: #ea4335; }
.pf-ico--lg { width: 44px; height: 44px; border-radius: 12px; }
.pf-ico--lg::after { inset: 11px; border-radius: 5px; }

/* ---------- 区块通用 ---------- */
.section { padding: 104px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(255, 244, 224, 0.018) 20%, rgba(255, 244, 224, 0.018) 80%, transparent); }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}
.section-desc { color: var(--text-2); font-size: 16.5px; }

.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 28px;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(212, 175, 106, 0.08), transparent 65%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-strong); background: var(--surface-strong); }
.card:hover::before { opacity: 1; }

.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; letter-spacing: 0.3px; }
.card p { font-size: 14.5px; color: var(--text-2); }

.card-icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  border-radius: 13px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}
.card-icon--gold   { background: rgba(234, 207, 155, 0.10); color: var(--gold-bright); }
.card-icon--copper { background: rgba(201, 138, 90, 0.12);  color: var(--copper); }
.card-icon--bronze { background: rgba(190, 160, 110, 0.12); color: var(--bronze); }

/* 服务卡片序号 */
.service-card { padding-top: 34px; }
.service-num {
  position: absolute;
  top: 18px; right: 22px;
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(240, 228, 200, 0.16);
}
.service-cta {
  background: var(--grad-soft);
  border-color: rgba(212, 175, 106, 0.35);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  justify-content: center;
}
.service-cta p { flex: 1; }

/* ---------- 数据带 ---------- */
.stat-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 44px;
  padding: 34px 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.stat { text-align: center; }
.stat strong {
  display: block;
  font-size: clamp(30px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat span { font-size: 13.5px; color: var(--text-3); }
.stat-note { margin-top: 12px; font-size: 12px; color: var(--text-3); text-align: right; }

/* ---------- GEO 定义卡 ---------- */
.def-card {
  font-size: 18px;
  line-height: 1.9;
  color: var(--text-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-image: none;
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.def-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad);
}
.def-card strong {
  color: var(--text);
  font-size: 21px;
  margin-right: 4px;
}

/* ---------- SEO vs GEO 对比 ---------- */
.vs-wrap {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 18px;
}
.vs-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 28px;
}
.vs-col--new {
  background: var(--grad-soft);
  border-color: rgba(212, 175, 106, 0.35);
  box-shadow: 0 0 40px rgba(212, 175, 106, 0.08);
}
.vs-col header { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.vs-col h3 { font-size: 18px; font-weight: 700; }
.vs-tag {
  font-size: 11.5px; font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(255, 244, 224, 0.08);
  color: var(--text-3);
  letter-spacing: 1px;
}
.vs-tag--new { background: var(--grad); color: var(--on-gold); }

.vs-col ul { display: flex; flex-direction: column; }
.vs-col li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px dashed var(--border);
  font-size: 14px;
}
.vs-col li:first-child { border-top: none; }
.vs-col li span { color: var(--text-3); flex: none; }
.vs-col li strong { font-weight: 600; text-align: right; color: var(--text); }
.vs-col--old li strong { color: var(--text-2); font-weight: 500; }

.vs-arrow {
  align-self: center;
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: var(--grad);
  color: var(--on-gold);
  box-shadow: var(--shadow-glow);
  animation: arrowPulse 2.4s ease infinite;
}
@keyframes arrowPulse { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(6px); } }

/* ---------- 覆盖平台 ---------- */
.pf-block { margin-bottom: 40px; }
.pf-block:last-child { margin-bottom: 0; }
.pf-block-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-3);
  margin-bottom: 20px;
  display: flex; align-items: center; gap: 12px;
}
.pf-block-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }

.pf-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.pf-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 24px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.pf-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.pf-card strong { font-size: 16.5px; }
.pf-card span { font-size: 13px; color: var(--text-3); line-height: 1.6; }

/* ---------- 服务流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.step:hover { transform: translateY(-5px); border-color: rgba(212, 175, 106, 0.4); }
.step::after {
  content: "";
  position: absolute;
  top: 44px; right: -15px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 10px rgba(212, 175, 106, 0.8);
}
.step:last-child::after { display: none; }

.step-num {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  border-radius: 13px;
  background: var(--grad);
  color: var(--on-gold);
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 18px;
  box-shadow: var(--shadow-glow);
}
.step-body h3 { font-size: 17.5px; font-weight: 700; margin-bottom: 10px; }
.step-body h3 em {
  font-style: normal;
  font-size: 12px;
  font-weight: 600;
  color: var(--gold);
  margin-left: 8px;
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(212, 175, 106, 0.10);
  vertical-align: middle;
}
.step-body p { font-size: 14px; color: var(--text-2); }

/* ---------- 案例 ---------- */
.case-card { display: flex; flex-direction: column; gap: 14px; }
.case-tag {
  align-self: flex-start;
  font-size: 12px; font-weight: 700;
  letter-spacing: 1px;
  padding: 4px 12px;
  border-radius: 999px;
  color: var(--gold);
  background: rgba(212, 175, 106, 0.09);
  border: 1px solid rgba(212, 175, 106, 0.25);
}
.case-card p { flex: 1; }
.case-metric {
  display: flex; flex-direction: column; gap: 2px;
  padding-top: 14px;
  border-top: 1px dashed var(--border);
}
.case-metric strong {
  font-size: 17px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.case-metric span { font-size: 12.5px; color: var(--text-3); }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item[open] { border-color: rgba(212, 175, 106, 0.4); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 19px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--gold); }

.faq-icon { position: relative; flex: none; width: 18px; height: 18px; }
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 14px; height: 2px;
  border-radius: 2px;
  background: var(--gold);
  transform: translate(-50%, -50%);
  transition: transform 0.3s ease;
}
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item[open] .faq-icon::after { transform: translate(-50%, -50%) rotate(0); }

.faq-body { padding: 0 24px 20px; }
.faq-body p { font-size: 14.5px; color: var(--text-2); }

/* ---------- CTA / 联系 ---------- */
.cta-section { padding-bottom: 120px; }
.cta-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: clamp(32px, 5vw, 64px);
  background:
    radial-gradient(600px circle at 15% 20%, rgba(212, 175, 106, 0.12), transparent 60%),
    radial-gradient(500px circle at 90% 90%, rgba(201, 138, 90, 0.10), transparent 60%),
    var(--surface);
  border: 1px solid rgba(212, 175, 106, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.cta-copy h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-copy > p { color: var(--text-2); margin-bottom: 24px; }

.cta-points { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.cta-points li {
  display: flex; align-items: center; gap: 12px;
  font-size: 15px;
  color: var(--text);
}
.cta-points li::before {
  content: "";
  flex: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--grad);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' fill='none' stroke='%23000' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  mask-size: 13px;
  mask-position: center;
  mask-repeat: no-repeat;
}

.cta-contact { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.cta-contact p { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-2); }
.cta-contact svg { color: var(--gold); }

/* 表单 */
.cta-form-wrap { position: relative; }
.cta-form {
  background: rgba(12, 10, 7, 0.6);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 30px 28px;
  backdrop-filter: blur(8px);
}
.cta-form h3 { font-size: 19px; font-weight: 700; margin-bottom: 20px; }

.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 7px;
}
.field label i { font-style: normal; color: #d97757; margin-left: 2px; }
.field input, .field textarea {
  width: 100%;
  background: rgba(255, 244, 224, 0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14.5px;
  color: var(--text);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  resize: vertical;
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-3); }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(212, 175, 106, 0.06);
  box-shadow: 0 0 0 3px rgba(212, 175, 106, 0.15);
}
.field.has-error input, .field.has-error textarea { border-color: #d97757; }

.form-note { margin-top: 14px; font-size: 12px; color: var(--text-3); text-align: center; }
.form-note.is-success { color: #8fbf9f; font-weight: 600; font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 64px 0 32px; background: rgba(0, 0, 0, 0.25); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 44px;
  margin-bottom: 48px;
}
.footer-brand p { margin-top: 18px; font-size: 13.5px; color: var(--text-3); line-height: 1.8; }

.footer-col { display: flex; flex-direction: column; gap: 12px; }
.footer-col h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.footer-col a, .footer-col span { font-size: 13.5px; color: var(--text-3); transition: color 0.2s ease; width: fit-content; }
.footer-col a:hover { color: var(--gold); }
.footer-cta {
  margin-top: 8px;
  font-weight: 600 !important;
  color: var(--gold) !important;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--text-3);
}

/* ---------- 悬浮 CTA ---------- */
.float-cta {
  position: fixed;
  right: 22px; bottom: 26px;
  z-index: 90;
  padding: 12px 22px;
  border-radius: 999px;
  background: var(--grad);
  color: var(--on-gold);
  font-size: 14px;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
}
.float-cta.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.float-cta:hover { transform: translateY(-3px); box-shadow: 0 0 34px rgba(212, 175, 106, 0.5); }

/* ---------- 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--d, 0) * 90ms);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { --d: 1; }
.reveal[data-delay="2"] { --d: 2; }
.reveal[data-delay="3"] { --d: 3; }
.reveal[data-delay="4"] { --d: 4; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 56px); }
  .hero-visual { max-width: 560px; }
  .chat-window { transform: none; }
  .pf-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
}

@media (max-width: 920px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 24px;
    background: rgba(12, 10, 7, 0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .main-nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-link { padding: 12px 14px; font-size: 15.5px; }
  .nav-link.is-active::after { display: none; }
  .nav-link.is-active { background: var(--grad-soft); color: var(--gold); }
  .nav-toggle { display: flex; }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .vs-wrap { grid-template-columns: 1fr; }
  .vs-arrow { transform: rotate(90deg); margin: 0 auto; animation: none; }
  .cta-panel { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 76px 0; }
  .section-head { margin-bottom: 40px; }
  .grid-3, .steps, .pf-grid { grid-template-columns: 1fr; }
  .stat-band { grid-template-columns: repeat(2, 1fr); padding: 26px 22px; gap: 26px 12px; }
  .hero-cta .btn { width: 100%; }
  .brand-text em { display: none; }
  .btn-label-full { display: none; }
  .btn-label-short { display: inline; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .chat-body { min-height: 220px; }
  .float-cta { right: 16px; bottom: 16px; padding: 11px 18px; }
}

/* ---------- 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
}