/* ============ 设计令牌 ============ */
:root {
  --bg: #071a16;
  --bg-2: #0a231e;
  --surface: rgba(255, 255, 255, .045);
  --surface-2: rgba(255, 255, 255, .07);
  --line: rgba(255, 255, 255, .1);
  --text: #eef3f0;
  --muted: rgba(238, 243, 240, .62);
  --faint: rgba(238, 243, 240, .38);
  --gold: #d9b472;
  --gold-2: #f0dcae;
  --gold-soft: rgba(217, 180, 114, .14);
  --teal: #34c79a;
  --danger: #e0857a;
  --shadow: 0 24px 60px rgba(0, 0, 0, .45);
  --radius: 18px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --maxw: 1180px;
}

[data-theme="light"] {
  --bg: #f7f5ef;
  --bg-2: #ffffff;
  --surface: rgba(12, 45, 38, .035);
  --surface-2: rgba(12, 45, 38, .06);
  --line: rgba(12, 45, 38, .12);
  --text: #0d2a23;
  --muted: rgba(13, 42, 35, .66);
  --faint: rgba(13, 42, 35, .42);
  --gold: #9c7433;
  --gold-2: #7d5b25;
  --gold-soft: rgba(156, 116, 51, .12);
  --teal: #12805f;
  --danger: #b4524a;
  --shadow: 0 20px 50px rgba(13, 42, 35, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .35s var(--ease), color .35s var(--ease);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--gold); color: #10241f; padding: 10px 16px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

.hl { color: var(--gold); font-weight: 600; }

/* ============ 头部 ============ */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  background: transparent;
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: var(--line);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .12);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 72px; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { color: var(--gold); display: grid; place-items: center; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 17px; letter-spacing: .06em; }
.brand-text em { font-style: normal; font-size: 11px; letter-spacing: .34em; color: var(--faint); }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 8px 12px; border-radius: 999px; font-size: 14.5px; color: var(--muted);
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav a:hover { color: var(--text); background: var(--surface); }
.nav a.is-active { color: var(--gold); background: var(--gold-soft); }
.nav-cta {
  margin-left: 8px; border: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
  color: var(--gold) !important;
}
.nav-cta:hover { background: var(--gold) !important; color: #10241f !important; }

.header-tools { display: flex; align-items: center; gap: 10px; }
.theme-switch {
  display: flex; padding: 3px; gap: 2px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line);
}
.theme-switch button {
  width: 30px; height: 30px; border: 0; border-radius: 999px; cursor: pointer;
  background: transparent; color: var(--faint);
  display: grid; place-items: center;
  transition: color .2s var(--ease), background .2s var(--ease);
}
.theme-switch button:hover { color: var(--text); }
.theme-switch button.is-active { background: var(--gold-soft); color: var(--gold); }

.nav-toggle {
  display: none; width: 40px; height: 40px; border: 1px solid var(--line);
  background: var(--surface); border-radius: 12px; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
}
.nav-toggle span { width: 18px; height: 1.5px; background: var(--text); border-radius: 2px; transition: transform .3s var(--ease), opacity .2s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding: 128px 0 80px; overflow: hidden;
  background:
    radial-gradient(1200px 620px at 78% 8%, rgba(217, 180, 114, .16), transparent 62%),
    radial-gradient(900px 520px at 12% 82%, rgba(52, 199, 154, .14), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
.hero-orbs { position: absolute; inset: 0; pointer-events: none; }
.hero-orbs span {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: .5;
  animation: float 16s var(--ease) infinite;
}
.hero-orbs span:nth-child(1) { width: 340px; height: 340px; background: rgba(217, 180, 114, .35); top: 8%; right: 6%; }
.hero-orbs span:nth-child(2) { width: 280px; height: 280px; background: rgba(52, 199, 154, .28); bottom: 12%; left: 4%; animation-delay: -5s; }
.hero-orbs span:nth-child(3) { width: 200px; height: 200px; background: rgba(255, 255, 255, .12); top: 46%; left: 52%; animation-delay: -9s; }
@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-24px, -28px, 0) scale(1.08); }
}

.hero-inner { position: relative; z-index: 2; }
.eyebrow {
  font-size: 13px; letter-spacing: .3em; color: var(--gold);
  text-transform: uppercase; margin: 0 0 22px;
}
.hero-title { margin: 0 0 26px; font-size: clamp(2.4rem, 6.4vw, 4.6rem); line-height: 1.14; font-weight: 700; letter-spacing: -.01em; }
.hero-title .line-gold {
  display: block; font-size: clamp(1rem, 2.4vw, 1.4rem); letter-spacing: .22em;
  color: var(--gold); font-weight: 500; margin-bottom: 18px;
}
.hero-title .line-main {
  background: linear-gradient(100deg, var(--text) 20%, var(--gold-2) 55%, var(--gold) 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 0 0 38px; max-width: 640px; color: var(--muted); font-size: clamp(.95rem, 1.6vw, 1.08rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 54px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 52px; padding: 0 30px; border-radius: 999px; font-size: 15.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.btn-primary {
  background: linear-gradient(120deg, var(--gold-2), var(--gold));
  color: #10241f; box-shadow: 0 14px 34px rgba(217, 180, 114, .3);
}
.btn-primary:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 20px 44px rgba(217, 180, 114, .42); }
.btn-ghost { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn-ghost:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--gold) 50%, transparent); color: var(--gold); }
.btn-lg { height: 58px; padding: 0 42px; font-size: 16.5px; }
.magnetic:hover { transform: translateY(-3px) scale(1.02); }

.flow-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.flow-chips li {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border-radius: 999px; font-size: 13.5px; color: var(--muted);
  background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  transition: color .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}
.flow-chips li:hover { color: var(--gold); border-color: color-mix(in srgb, var(--gold) 45%, transparent); transform: translateY(-2px); }
.flow-chips b { font-size: 11px; letter-spacing: .1em; color: var(--gold); }

.scroll-hint { position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%); }
.scroll-hint span {
  display: block; width: 24px; height: 40px; border: 1px solid var(--faint); border-radius: 999px; position: relative;
}
.scroll-hint span::after {
  content: ""; position: absolute; left: 50%; top: 8px; width: 3px; height: 7px; border-radius: 2px;
  background: var(--gold); transform: translateX(-50%); animation: wheel 1.8s var(--ease) infinite;
}
@keyframes wheel { 0% { opacity: 0; transform: translate(-50%, -4px); } 40% { opacity: 1; } 100% { opacity: 0; transform: translate(-50%, 14px); } }

/* ============ 区块通用 ============ */
.section { padding: 112px 0; position: relative; }
.section-alt { background: var(--bg-2); }
.section-alt::before, .section-alt::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}
.section-alt::before { top: 0; } .section-alt::after { bottom: 0; }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-lead { margin: 18px 0 0; color: var(--muted); font-size: 1rem; line-height: 1.8; }
.section-tag {
  display: inline-block; margin: 0 0 16px; font-size: 12.5px; letter-spacing: .28em;
  color: var(--gold); text-transform: uppercase;
}
.section-tag.gold { color: var(--gold); }
.section-title { margin: 0 0 16px; font-size: clamp(1.6rem, 3.4vw, 2.5rem); line-height: 1.3; font-weight: 700; letter-spacing: -.005em; }
.section-desc { margin: 0; color: var(--muted); font-size: 1.02rem; }

/* ============ 卡片 ============ */
.glass-card {
  position: relative; padding: 34px 30px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  backdrop-filter: blur(14px);
  transition: transform .4s var(--ease), border-color .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
}
.glass-card::before {
  content: ""; position: absolute; inset: 0 0 auto; height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent 70%); border-radius: var(--radius) var(--radius) 0 0;
  opacity: .7;
}
.glass-card:hover { transform: translateY(-6px); border-color: color-mix(in srgb, var(--gold) 40%, transparent); box-shadow: var(--shadow); }
.glass-card h3 { margin: 14px 0 10px; font-size: 1.22rem; }
.glass-card p { margin: 0; color: var(--muted); font-size: .96rem; }
.card-num { font-size: 13px; letter-spacing: .18em; color: var(--gold); font-weight: 600; }

.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-punch {
  margin: 46px auto 0; text-align: center; max-width: 760px;
  font-size: clamp(1.15rem, 2.6vw, 1.6rem); font-weight: 600; line-height: 1.6;
}

/* ============ 信息源 ============ */
.source-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.source-card { padding: 34px 32px; }
.source-card h3 { margin: 4px 0 0; font-size: 1.3rem; }
.src-head { display: flex; align-items: flex-start; gap: 16px; }
.src-icon {
  flex: none; width: 48px; height: 48px; border-radius: 15px; display: grid; place-items: center;
  background: var(--gold-soft); color: var(--gold);
  border: 1px solid color-mix(in srgb, var(--gold) 32%, transparent);
}
.src-community .src-icon {
  background: color-mix(in srgb, var(--teal) 16%, transparent);
  color: var(--teal);
  border-color: color-mix(in srgb, var(--teal) 34%, transparent);
}
.src-tag {
  display: inline-block; font-size: 11.5px; letter-spacing: .2em; color: var(--faint);
}
.src-sub { margin: 16px 0 18px; color: var(--muted); font-size: .98rem; }
.source-card .tick-list li { color: var(--text); }
.source-card .step-note { margin-top: 20px; }

.source-chain {
  margin-top: 36px; padding: 24px; border-radius: 18px; text-align: center;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px;
  background: linear-gradient(120deg, var(--gold-soft), transparent 70%);
  border: 1px solid color-mix(in srgb, var(--gold) 28%, transparent);
}
.source-chain span {
  padding: 9px 18px; border-radius: 999px; font-size: .92rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--line);
}
.source-chain b {
  padding: 9px 20px; border-radius: 999px; font-size: .94rem; font-weight: 700; color: #10241f;
  background: linear-gradient(120deg, var(--gold-2), var(--gold));
  box-shadow: 0 10px 24px rgba(217, 180, 114, .28);
}
.source-chain i { color: var(--gold); font-style: normal; font-size: 1.05rem; }
.source-punch {
  margin: 34px auto 0; text-align: center; font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  font-weight: 600; line-height: 1.6;
}

/* ============ 步骤 ============ */
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.step {
  position: relative; padding: 32px 30px 30px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.step:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--gold) 42%, transparent); box-shadow: var(--shadow); }
.step:last-child { grid-column: 1 / -1; }
.step-badge {
  display: inline-block; padding: 5px 14px; border-radius: 999px; font-size: 12px; letter-spacing: .18em;
  color: var(--gold); background: var(--gold-soft); border: 1px solid color-mix(in srgb, var(--gold) 30%, transparent);
}
.step h3 { margin: 16px 0 8px; font-size: 1.32rem; }
.step-lead { margin: 0 0 18px; color: var(--muted); font-size: .98rem; }
.step-note {
  margin: 18px 0 0; padding: 12px 16px; border-radius: 12px; font-size: .9rem; color: var(--gold);
  background: var(--gold-soft); border-left: 2px solid var(--gold);
}
.tick-list li { position: relative; padding-left: 26px; margin-bottom: 10px; color: var(--text); font-size: .96rem; }
.tick-list li::before {
  content: ""; position: absolute; left: 4px; top: 10px; width: 9px; height: 9px; border-radius: 3px;
  background: linear-gradient(135deg, var(--gold-2), var(--gold)); transform: rotate(45deg);
}
.mini-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.mini-grid div {
  padding: 16px 18px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--line);
}
.mini-grid b { display: block; margin-bottom: 6px; font-size: .98rem; }
.mini-grid span { color: var(--muted); font-size: .88rem; line-height: 1.6; }

/* ============ 实战案例 ============ */
/* ---- 举例说明 ---- */
.example {
  padding: 36px; border-radius: 22px; margin-bottom: 52px;
  background: var(--surface); border: 1px solid var(--line);
}
.example-head { margin-bottom: 28px; }
.example-tag { font-size: 12px; letter-spacing: .24em; color: var(--gold); }
.example-head h3 { margin: 10px 0 8px; font-size: clamp(1.2rem, 2.4vw, 1.55rem); line-height: 1.4; }
.example-head p { margin: 0; color: var(--muted); font-size: .98rem; }
.ex-chain { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin: 0; padding: 0; list-style: none; }
.ex-step {
  position: relative; padding: 22px 20px 24px; border-radius: 16px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.ex-arrow {
  position: absolute; right: -21px; top: 50%;
  width: 13px; height: 13px;
  border-top: 2px solid var(--gold); border-right: 2px solid var(--gold);
  transform: translateY(-50%) rotate(45deg); opacity: .75;
}
.ex-k { display: block; margin-bottom: 10px; font-size: .78rem; letter-spacing: .08em; color: var(--faint); }
.ex-v { margin: 0; font-size: .95rem; line-height: 1.75; color: var(--text); }
.ex-step.old .ex-k { color: var(--danger); }
.ex-step.old .ex-v { color: var(--muted); }
.ex-step.new .ex-k { color: var(--teal); }
.ex-step.result {
  background: linear-gradient(140deg, color-mix(in srgb, var(--gold) 14%, transparent), transparent 72%), var(--surface-2);
  border-color: color-mix(in srgb, var(--gold) 30%, transparent);
}
.ex-step.result .ex-k { color: var(--gold); }
.ex-step.result .ex-v { font-weight: 600; }
.example-note { margin: 24px 0 0; text-align: center; font-size: .92rem; color: var(--faint); line-height: 1.8; }

/* ---- 更多行业类比 ---- */
.matrix { margin-top: 52px; }
.matrix-group + .matrix-group { margin-top: 46px; }
.matrix-head { margin-bottom: 24px; }
.matrix-chip {
  display: inline-block; padding: 5px 13px; border-radius: 999px;
  font-size: 12px; letter-spacing: .1em; color: var(--teal);
  background: color-mix(in srgb, var(--teal) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--teal) 34%, transparent);
}
.matrix-chip.alt {
  color: var(--gold);
  background: color-mix(in srgb, var(--gold) 14%, transparent);
  border-color: color-mix(in srgb, var(--gold) 36%, transparent);
}
.matrix-head h3 { margin: 14px 0 6px; font-size: clamp(1.1rem, 2vw, 1.35rem); line-height: 1.5; }
.matrix-head p { margin: 0; color: var(--muted); font-size: .95rem; }
.ind-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ind-card {
  padding: 24px 22px 26px; border-radius: 18px;
  background: var(--surface); border: 1px solid var(--line);
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.ind-card:hover {
  transform: translateY(-6px);
  border-color: color-mix(in srgb, var(--gold) 34%, transparent);
  box-shadow: var(--shadow);
}
.ind-card h4 { margin: 0 0 5px; font-size: 1.04rem; line-height: 1.4; }
.ind-scene { margin: 0 0 16px; font-size: .84rem; color: var(--faint); letter-spacing: .02em; }
.ind-row {
  display: grid; grid-template-columns: 66px 1fr; gap: 10px; align-items: start;
  padding: 9px 0; border-top: 1px solid var(--line);
}
.ind-k {
  font-size: .74rem; line-height: 1.7; color: var(--faint);
  letter-spacing: .04em; white-space: nowrap;
}
.ind-row p { margin: 0; font-size: .88rem; line-height: 1.7; color: var(--muted); }
.ind-row.gold .ind-k { color: var(--gold); }
.ind-row.gold p { color: var(--text); font-weight: 500; }
.matrix-foot {
  margin-top: 40px; padding: 26px 28px; border-radius: 18px; text-align: center;
  background: linear-gradient(120deg, color-mix(in srgb, var(--gold) 12%, transparent), transparent 70%), var(--surface-2);
  border: 1px solid color-mix(in srgb, var(--gold) 26%, transparent);
}
.matrix-foot p { margin: 0; font-size: 1.02rem; color: var(--muted); line-height: 1.8; }
.matrix-foot b { color: var(--gold); font-weight: 600; }

/* ============ 展示场景 ============ */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.scene-card { margin: 0; text-align: center; }
.scene-shot {
  width: 100%; max-width: 300px; margin: 0 auto 20px;
  border-radius: 26px; padding: 10px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--text) 12%, transparent), transparent 60%), var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden; transition: transform .45s var(--ease);
}
.scene-card:hover .scene-shot { transform: translateY(-8px) scale(1.015); }
.scene-shot img {
  display: block; width: 100%; height: auto;
  border-radius: 18px; background: #fff;
}
.scene-card figcaption b { display: block; font-size: 1.02rem; margin-bottom: 4px; }
.scene-card figcaption span { color: var(--muted); font-size: .9rem; }

/* ============ 成本对比 ============ */
.compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: center; }
.compare-col { padding: 32px 30px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); }
.compare-col.new { border-color: color-mix(in srgb, var(--gold) 40%, transparent); box-shadow: 0 18px 44px rgba(217, 180, 114, .12); }
.compare-col h3 { margin: 0 0 22px; font-size: 1.18rem; display: flex; flex-direction: column; gap: 4px; }
.compare-col h3 em { font-style: normal; font-size: .84rem; color: var(--faint); font-weight: 400; letter-spacing: .06em; }
.compare-col ul li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.compare-col ul li:last-child { border-bottom: 0; }
.compare-col li span { color: var(--muted); font-size: .92rem; }
.compare-col li b { font-size: .96rem; }
.compare-col li b.big { font-size: 1.5rem; color: var(--gold); }
.old li b.big { color: var(--danger); }
.compare-foot { margin: 20px 0 0; font-size: .92rem; padding-top: 14px; border-top: 1px solid var(--line); }
.compare-foot.bad { color: var(--danger); }
.compare-foot.good { color: var(--teal); }
.vs {
  width: 62px; height: 62px; border-radius: 50%; display: grid; place-items: center;
  font-weight: 800; font-size: 15px; letter-spacing: .04em; color: var(--gold);
  background: var(--surface-2); border: 1px solid color-mix(in srgb, var(--gold) 45%, transparent);
  margin: 0 auto;
}
.saving {
  margin-top: 34px; padding: 30px; border-radius: 20px; text-align: center;
  background: linear-gradient(120deg, var(--gold-soft), transparent 70%);
  border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
}
.saving-num { margin: 0; font-size: clamp(1.3rem, 3vw, 1.9rem); font-weight: 700; }
.saving-num b { color: var(--gold); font-size: 1.25em; }
.saving-text { margin: 8px 0 0; color: var(--muted); }

/* ============ 联系 ============ */
.contact { padding-bottom: 120px; }
.contact-card {
  padding: 56px 44px; border-radius: 26px; text-align: center;
  background: radial-gradient(700px 340px at 50% 0%, var(--gold-soft), transparent 65%), var(--surface);
  border: 1px solid color-mix(in srgb, var(--gold) 32%, transparent);
}
.contact-title { margin: 0 0 12px; font-size: clamp(1.6rem, 3.6vw, 2.4rem); font-weight: 700; }
.contact-sub { margin: 0 0 38px; color: var(--muted); }
.contact-grid { display: flex; justify-content: center; flex-wrap: wrap; gap: 18px; margin-bottom: 22px; }
.contact-item {
  display: flex; align-items: center; gap: 12px; padding: 16px 22px; border-radius: 16px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.ci-label { font-size: 12px; letter-spacing: .2em; color: var(--gold); }
.ci-value { font-size: 1.15rem; font-weight: 600; letter-spacing: .04em; }
.copy-btn {
  border: 1px solid var(--line); background: transparent; color: var(--muted);
  border-radius: 999px; padding: 5px 14px; font-size: 12.5px; cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}
.copy-btn:hover { color: var(--gold); border-color: color-mix(in srgb, var(--gold) 50%, transparent); background: var(--gold-soft); }
.contact-tip { margin: 0 0 32px; color: var(--muted); font-size: .94rem; }
.contact-tip b { color: var(--text); }

/* ============ 页脚 ============ */
.site-footer { padding: 46px 0; border-top: 1px solid var(--line); background: var(--bg-2); }
.footer-inner { text-align: center; }
.footer-brand { margin: 0 0 8px; font-size: 1.05rem; letter-spacing: .08em; }
.footer-brand span { color: var(--gold); }
.footer-slogan { margin: 0 0 6px; color: var(--muted); font-size: .9rem; letter-spacing: .12em; }
.footer-copy { margin: 0; color: var(--faint); font-size: .82rem; }

/* ============ Toast ============ */
.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translate(-50%, 20px);
  padding: 12px 22px; border-radius: 999px; font-size: 14px; z-index: 80;
  background: var(--text); color: var(--bg); opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ============ 滚动渐入 ============ */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 1000px) {
  .value-grid, .scene-grid { grid-template-columns: 1fr 1fr; }
  .scene-grid .scene-card:last-child { grid-column: 1 / -1; }
  .source-grid { grid-template-columns: 1fr; }
  .ind-grid { grid-template-columns: 1fr 1fr; }
  .ex-chain { grid-template-columns: 1fr; gap: 24px; }
  .ex-arrow {
    right: auto; left: 50%; top: auto; bottom: -19px;
    transform: translateX(-50%) rotate(135deg);
  }
}
@media (max-width: 860px) {
  .nav {
    position: fixed; inset: 72px 16px auto; flex-direction: column; align-items: stretch; gap: 6px;
    padding: 16px; border-radius: 18px; background: color-mix(in srgb, var(--bg) 96%, transparent);
    border: 1px solid var(--line); box-shadow: var(--shadow);
    opacity: 0; transform: translateY(-12px); pointer-events: none;
    transition: opacity .28s var(--ease), transform .28s var(--ease);
  }
  .nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav a { padding: 12px 14px; font-size: 16px; }
  .nav-cta { margin: 6px 0 0; text-align: center; }
  .nav-toggle { display: flex; }
  .steps { grid-template-columns: 1fr; }
  .step:last-child { grid-column: auto; }
  .compare { grid-template-columns: 1fr; }
  .vs { width: 48px; height: 48px; }
  .section { padding: 80px 0; }
  .hero { padding-top: 108px; }
}
@media (max-width: 620px) {
  .value-grid, .scene-grid, .mini-grid { grid-template-columns: 1fr; }
  .scene-grid .scene-card:last-child { grid-column: auto; }
  .ind-grid { grid-template-columns: 1fr; }
  .ind-row { grid-template-columns: 1fr; gap: 2px; }
  .matrix-foot { padding: 22px 18px; }
  .example { padding: 26px 20px; }
  .ex-step { padding: 18px 16px 20px; }
  .contact-card { padding: 40px 22px; }
  .contact-item { width: 100%; justify-content: space-between; }
  .hero-actions .btn { flex: 1 1 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--gold); color: #10241f; }