/* 交大百年财富 · 黑金系统 全站样式 */
:root {
  --gold: #d4af37;
  --gold-light: #f0d98c;
  --gold-dark: #8a6d1f;
  --bg: #0a0a0f;
  --bg-2: #12121a;
  --bg-3: #1a1a26;
  --text: #f5f0e1;
  --text-dim: #b8b2a0;
  --line: rgba(212, 175, 55, .25);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Serif SC", serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
}
a { color: var(--gold-light); text-decoration: none; }
img { max-width: 100%; }
.container { width: min(1200px, 92%); margin: 0 auto; }

/* 顶部导航 */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 10, 15, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-badge {
  width: 44px; height: 44px; border: 1px solid var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; color: var(--gold); font-weight: 700; letter-spacing: 1px;
  background: radial-gradient(circle at 30% 30%, rgba(212,175,55,.25), transparent);
}
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: 2px; }
.brand-sub { font-size: 11px; color: var(--text-dim); letter-spacing: 3px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { color: var(--text-dim); font-size: 14px; letter-spacing: 1px; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--gold); }
.nav-cta {
  padding: 9px 22px; border: 1px solid var(--gold);
  color: var(--gold) !important; font-weight: 600;
  background: linear-gradient(135deg, rgba(212,175,55,.15), rgba(212,175,55,.05));
}
@media (max-width: 900px) { .nav-links { display: none; } }

/* Hero */
.hero {
  position: relative; overflow: hidden; text-align: center;
  padding: 110px 0 90px;
  background:
    radial-gradient(ellipse 60% 50% at 50% -10%, rgba(212,175,55,.18), transparent),
    radial-gradient(ellipse 40% 40% at 85% 110%, rgba(212,175,55,.08), transparent),
    var(--bg);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(212,175,55,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212,175,55,.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.hero-tag {
  display: inline-block; padding: 6px 18px; font-size: 13px; letter-spacing: 4px;
  color: var(--gold); border: 1px solid var(--line); margin-bottom: 26px;
}
.hero h1 {
  font-size: clamp(34px, 5.5vw, 62px); font-weight: 800; letter-spacing: 4px;
  background: linear-gradient(180deg, #fff8e1 0%, var(--gold) 55%, var(--gold-dark) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 18px;
}
.hero .en { font-size: 12px; letter-spacing: 8px; color: var(--text-dim); text-transform: uppercase; }
.hero p.lead {
  max-width: 760px; margin: 22px auto 38px; color: var(--text-dim);
  font-size: 17px; line-height: 2;
}
.hero-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 40px; font-size: 15px; letter-spacing: 2px;
  border: 1px solid var(--gold); cursor: pointer; transition: all .25s;
}
.btn-solid {
  background: linear-gradient(135deg, #f0d98c, #d4af37 45%, #9c7c22);
  color: #14100a; font-weight: 700; border: none;
}
.btn-solid:hover { filter: brightness(1.12); transform: translateY(-2px); }
.btn-ghost { color: var(--gold); }
.btn-ghost:hover { background: rgba(212,175,55,.12); }

/* 金色数据条 */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); margin: 70px auto 0;
}
.stat { background: var(--bg-2); padding: 28px 12px; text-align: center; }
.stat b { display: block; font-size: 34px; color: var(--gold); font-weight: 800; }
.stat span { font-size: 13px; color: var(--text-dim); letter-spacing: 1px; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, 1fr); } }

/* 区块 */
section { padding: 84px 0; }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .kicker { font-size: 13px; letter-spacing: 6px; color: var(--gold); }
.sec-head h2 {
  font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; letter-spacing: 3px; margin-top: 10px;
}
.sec-head .sub { color: var(--text-dim); max-width: 720px; margin: 14px auto 0; font-size: 15px; }
.sec-head::after {
  content: ""; display: block; width: 60px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent); margin: 22px auto 0;
}

/* 行业卡片 */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
@media (max-width: 960px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
.card {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  border: 1px solid var(--line); padding: 30px 26px; position: relative;
  transition: transform .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); border-color: var(--gold); }
.card .num {
  font-size: 13px; color: var(--gold); letter-spacing: 2px; font-weight: 700;
}
.card h3 { font-size: 19px; margin: 10px 0 8px; letter-spacing: 1px; }
.card p { font-size: 14px; color: var(--text-dim); }
.card .tagline {
  display: inline-block; margin-top: 14px; font-size: 12px; color: var(--gold);
  border-top: 1px solid var(--line); padding-top: 10px; width: 100%;
}

/* 价格表 */
.tiers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
@media (max-width: 1080px) { .tiers { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .tiers { grid-template-columns: 1fr; } }
.tier {
  background: var(--bg-2); border: 1px solid var(--line); padding: 34px 26px;
  display: flex; flex-direction: column; position: relative;
}
.tier.featured {
  border: 1px solid var(--gold);
  background: linear-gradient(180deg, rgba(212,175,55,.10), var(--bg-2));
  transform: scale(1.03);
}
.tier .ribbon {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #f0d98c, #9c7c22); color: #14100a;
  font-size: 12px; font-weight: 700; padding: 4px 16px; letter-spacing: 2px; white-space: nowrap;
}
.tier h3 { font-size: 18px; letter-spacing: 2px; }
.tier .price { font-size: 34px; color: var(--gold); font-weight: 800; margin: 14px 0 4px; }
.tier .price small { font-size: 14px; color: var(--text-dim); font-weight: 400; }
.tier ul { list-style: none; margin: 20px 0 26px; flex: 1; }
.tier li { font-size: 14px; color: var(--text-dim); padding: 7px 0 7px 24px; position: relative; }
.tier li::before { content: "◆"; position: absolute; left: 0; color: var(--gold); font-size: 11px; top: 10px; }
.tier li.no { opacity: .4; }
.tier li.no::before { content: "—"; }

/* 导师 */
.mentor {
  text-align: center; background: var(--bg-2); border: 1px solid var(--line); padding: 34px 22px;
}
.mentor .avatar {
  width: 92px; height: 92px; margin: 0 auto 18px; border-radius: 50%;
  border: 1px solid var(--gold); display: flex; align-items: center; justify-content: center;
  font-size: 30px; color: var(--gold); font-weight: 800;
  background: radial-gradient(circle at 35% 30%, rgba(212,175,55,.28), rgba(212,175,55,.04));
}
.mentor .photo {
  width: 150px; height: 150px; object-fit: cover; border-radius: 6px;
  display: block; margin: 0 auto 18px;
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 1px rgba(212,175,55,.2), 0 10px 30px rgba(0,0,0,.55);
  position: relative;
}
.mentor .photo-wrap { position: relative; width: 150px; margin: 0 auto 18px; }
.mentor .photo-wrap::after {
  content: ""; position: absolute; left: 8px; right: -8px; bottom: -8px; top: 8px;
  border: 1px solid var(--line); z-index: -1; pointer-events: none;
}
.mentor h3 { font-size: 18px; letter-spacing: 2px; }
.mentor .role { color: var(--gold); font-size: 13px; margin: 8px 0; }
.mentor p { font-size: 13px; color: var(--text-dim); }
.mentor .pill {
  display: inline-block; margin: 10px 4px 0; font-size: 11px; padding: 3px 10px;
  border: 1px solid var(--line); color: var(--text-dim);
}

/* 时间线 */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 1px;
  background: linear-gradient(180deg, var(--gold), transparent);
}
.tl-item { position: relative; padding: 0 0 38px 22px; }
.tl-item::before {
  content: ""; position: absolute; left: -31px; top: 10px; width: 11px; height: 11px;
  background: var(--bg); border: 2px solid var(--gold); transform: rotate(45deg);
}
.tl-item .date { color: var(--gold); font-size: 13px; letter-spacing: 2px; }
.tl-item h3 { font-size: 18px; margin: 6px 0; }
.tl-item p { color: var(--text-dim); font-size: 14px; }

/* FAQ */
details { background: var(--bg-2); border: 1px solid var(--line); margin-bottom: 12px; }
summary {
  padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600;
  letter-spacing: 1px; list-style: none; position: relative;
}
summary::after { content: "+"; position: absolute; right: 24px; color: var(--gold); font-size: 20px; }
details[open] summary::after { content: "−"; }
details .ans { padding: 0 24px 22px; color: var(--text-dim); font-size: 14px; }

/* CTA 条 */
.cta-bar {
  text-align: center; padding: 70px 0;
  background: linear-gradient(135deg, rgba(212,175,55,.14), rgba(212,175,55,.04));
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.cta-bar h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: 3px; margin-bottom: 12px; }
.cta-bar p { color: var(--text-dim); margin-bottom: 28px; }

/* 页脚 */
footer { background: #07070b; border-top: 1px solid var(--line); padding: 50px 0 30px; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
.foot-grid h4 { color: var(--gold); font-size: 14px; letter-spacing: 2px; margin-bottom: 14px; }
.foot-grid a { display: block; color: var(--text-dim); font-size: 13px; padding: 4px 0; }
.foot-grid a:hover { color: var(--gold); }
.copyright { text-align: center; color: #6b675c; font-size: 12px; margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(212,175,55,.12); }

/* 表单 */
.form-wrap { max-width: 960px; margin: 0 auto; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.field label { display: block; font-size: 13px; color: var(--gold); letter-spacing: 2px; margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--bg-3); border: 1px solid var(--line); color: var(--text);
  padding: 13px 16px; font-size: 15px; outline: none; font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--gold); }
.notice { font-size: 12px; color: #8a8577; margin-top: 16px; line-height: 1.9; }

/* 付费成功弹层 */
.pay-mask {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(5,5,8,.9); align-items: center; justify-content: center;
}
.pay-mask.show { display: flex; }
.pay-box {
  width: min(520px, 92%); background: var(--bg-2); border: 1px solid var(--gold);
  padding: 46px 40px; text-align: center;
}
.pay-box .icon { font-size: 46px; color: var(--gold); }
.pay-box h3 { font-size: 24px; letter-spacing: 3px; margin: 16px 0 10px; }
.pay-box p { color: var(--text-dim); font-size: 14px; }
.pay-box .qr {
  width: 150px; height: 150px; margin: 20px auto; border: 1px solid var(--gold);
  display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--gold);
  background:
    repeating-linear-gradient(0deg, rgba(212,175,55,.35) 0 6px, transparent 6px 12px),
    repeating-linear-gradient(90deg, rgba(212,175,55,.35) 0 6px, transparent 6px 12px);
}

/* ===== 数字人引擎 ===== */
.dh-host { display: block; }
.dh-host .dh-svg { width: 100%; max-width: 230px; display: block; margin: 0 auto; filter: drop-shadow(0 0 14px rgba(212,175,55,.35)); }
.dh-host .dh-eye { animation: dh-blink 4.2s infinite; transform-origin: center; }
.dh-host .dh-eye:last-child { animation-delay: .06s; }
@keyframes dh-blink { 0%,94%,100% { transform: scaleY(1); } 96.5% { transform: scaleY(.08); } }
.dh-host .dh-mouth-wrap { transition: transform .1s ease; }
.dh-speaking .dh-mouth-wrap { animation: dh-jaw .21s ease-in-out infinite alternate; }
@keyframes dh-jaw { from { transform: translateY(0); } to { transform: translateY(1.6px); } }
.dh-host .dh-svg { animation: dh-breath 3.8s ease-in-out infinite; }
@keyframes dh-breath { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-3px); } }
.dh-voice-toggle { font-size: 11px; color: var(--gold-light); border: 1px solid var(--line); padding: 3px 12px; cursor: pointer; letter-spacing: 1px; user-select: none; }
.dh-voice-toggle.off { color: var(--text-dim); }