/* ==========================================================================
   域见星光 · 大健康私域直播
   设计方向：墨绿 · 草本 —— 深墨绿为骨，米白为息，暖金为光
   ========================================================================== */

/* ---------- 变量 ---------- */
:root {
  --ink:        #0C1D1A;
  --forest:     #16302B;
  --forest-2:   #1D3D35;
  --forest-3:   #254A40;
  --sand:       #F7F4EE;
  --paper:      #FCFAF6;
  --gold:       #C9A227;
  --gold-lt:    #E3CE8F;
  --gold-dim:   #A8891F;
  --sage:       #55685F;
  --sage-lt:    #9AABA1;

  --line:       rgba(22, 48, 43, .14);
  --line-soft:  rgba(22, 48, 43, .08);
  --line-inv:   rgba(247, 244, 238, .16);
  --line-inv-soft: rgba(247, 244, 238, .09);

  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --num:   "Cormorant Garamond", "Georgia", serif;
  --sans:  -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
           "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --pad: clamp(72px, 8.5vw, 128px);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--sand);
  color: var(--forest);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.9;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

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

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

:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 3px;
}
.hero :focus-visible,
.method :focus-visible,
.proof :focus-visible,
.contact :focus-visible,
.foot :focus-visible {
  outline-color: var(--gold-lt);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--forest);
  color: var(--gold-lt);
  padding: 12px 20px;
  z-index: 999;
}
.skip:focus { left: 12px; top: 12px; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(1240px, calc(100% - clamp(40px, 8vw, 128px)));
  margin-inline: auto;
}

/* ---------- 排版原子 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 26px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--sage-lt);
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--gold);
  flex: none;
}
.eyebrow.dark { color: var(--sage); }

.h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.15rem, 4vw, 3.7rem);
  line-height: 1.26;
  letter-spacing: .01em;
  color: var(--forest);
}
.h2.light { color: var(--sand); }

.col-note {
  margin: 34px 0 0;
  max-width: 22em;
  font-size: 1rem;
  line-height: 2;
  color: var(--sage);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.aside-note {
  margin: 28px 0 0;
  max-width: 20em;
  font-size: .95rem;
  line-height: 1.9;
  color: var(--sage);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: .06em;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background .35s var(--ease), color .35s var(--ease),
              border-color .35s var(--ease), transform .35s var(--ease);
}
.btn-solid {
  background: var(--gold);
  color: var(--ink);
}
.btn-solid:hover { background: var(--gold-lt); transform: translateY(-2px); }

.btn-ghost {
  border-color: var(--line-inv);
  color: var(--sand);
}
.btn-ghost:hover {
  border-color: var(--gold-lt);
  color: var(--gold-lt);
}

.btn-line {
  border-color: var(--line);
  padding: 12px 24px;
  font-size: .88rem;
}
.btn-line:hover { border-color: var(--forest); background: var(--forest); color: var(--sand); }

.btn .dot {
  width: 6px; height: 6px;
  background: var(--gold);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(201, 162, 39, .22);
}

/* ==========================================================================
   导航
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  padding: 18px 0;
  transition: padding .4s var(--ease), background .4s var(--ease),
              border-color .4s var(--ease), backdrop-filter .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.stuck {
  padding: 11px 0;
  background: rgba(10, 24, 21, .93);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom-color: var(--line-inv-soft);
}

.nav-inner {
  width: min(1240px, calc(100% - clamp(40px, 8vw, 128px)));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--gold-lt);
  flex-shrink: 0;
}
.brand-mark {
  width: 44px;
  height: 44px;
  color: var(--gold);
  transition: transform .6s var(--ease);
}
.brand:hover .brand-mark { transform: rotate(24deg); }
.brand-mark.sm { width: 36px; height: 36px; }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-cn {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--sand);
}
.brand-en {
  font-family: var(--num);
  font-size: .64rem;
  letter-spacing: .3em;
  color: var(--sage-lt);
  margin-top: 3px;
}

.nav-links {
  display: flex;
  gap: 34px;
  margin-right: auto;
}
.nav-links a {
  position: relative;
  font-size: .92rem;
  letter-spacing: .08em;
  color: rgba(247, 244, 238, .72);
  transition: color .3s var(--ease);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width .35s var(--ease);
}
.nav-links a:hover { color: var(--sand); }
.nav-links a:hover::after { width: 100%; }

.nav-cta { display: flex; align-items: center; gap: 22px; }
.nav-tel {
  font-family: var(--sans);
  font-size: 1.12rem;
  font-weight: 500;
  letter-spacing: .01em;
  font-variant-numeric: tabular-nums;
  color: var(--sand);
  transition: color .3s var(--ease);
}
.nav-tel:hover { color: var(--gold-lt); }
.nav-cta .btn-line { border-color: var(--line-inv); color: var(--sand); }
.nav-cta .btn-line:hover { background: var(--gold); border-color: var(--gold); color: var(--ink); }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 34px; height: 34px;
  background: none; border: 0; padding: 0;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 6px; right: 6px;
  height: 1px;
  background: var(--sand);
  transition: transform .35s var(--ease), opacity .3s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

.mobile-menu {
  display: none;
  padding: 18px clamp(20px, 6vw, 64px) 30px;
  background: rgba(12, 29, 26, .97);
  backdrop-filter: blur(14px);
}
.mobile-menu a {
  display: block;
  padding: 13px 0;
  font-size: .95rem;
  color: rgba(247, 244, 238, .8);
  border-bottom: 1px solid var(--line-inv-soft);
}
.mobile-menu .mobile-tel {
  margin-top: 16px;
  border: 0;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.35rem;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-lt);
}

/* ==========================================================================
   首屏
   ========================================================================== */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  background: var(--forest);
  color: var(--sand);
  padding-top: clamp(118px, 12.5vw, 158px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 700px at 78% 32%, rgba(37, 74, 64, .55), transparent 62%),
    radial-gradient(760px 520px at 12% 8%, rgba(201, 162, 39, .07), transparent 70%);
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  width: 620px; height: 620px;
  right: -140px; top: 40px;
  background: radial-gradient(circle, rgba(201, 162, 39, .075), transparent 62%);
  filter: blur(20px);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  flex: 1;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  align-items: center;
  gap: clamp(20px, 4vw, 60px);
  min-height: clamp(400px, 46vh, 520px);
}

.hero-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3.1rem, 7vw, 6.2rem);
  line-height: 1.06;
  letter-spacing: .02em;
  color: var(--sand);
}
.hero-title span { display: block; }
.hero-title span:last-child { color: var(--gold-lt); }

.hero-lead {
  margin: clamp(26px, 3vw, 40px) 0 0;
  text-wrap: pretty;
  max-width: 25em;
  font-size: clamp(1rem, 1.15vw, 1.12rem);
  line-height: 2;
  color: rgba(247, 244, 238, .74);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: clamp(32px, 4vw, 48px);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.signal {
  width: min(490px, 100%);
  height: auto;
  overflow: visible;
}
.signal .arcs path {
  transform-origin: 260px 300px;
  animation: breathe 6s ease-in-out infinite;
}
.signal .arcs path:nth-child(2) { animation-delay: .5s; }
.signal .arcs path:nth-child(3) { animation-delay: 1s; }
.signal .arcs path:nth-child(4) { animation-delay: 1.5s; }

@keyframes breathe {
  0%, 100% { opacity: .35; }
  50%      { opacity: 1; }
}

.hero-tagline {
  margin: 26px 0 0;
  font-size: 1.05rem;
  letter-spacing: .1em;
  color: rgba(247, 244, 238, .78);
  padding-left: 14px;
  border-left: 1px solid rgba(201, 162, 39, .55);
}

.hero-scope {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 30px;
  margin: 0;
  padding-top: 26px;
  border-top: 1px solid var(--line-inv-soft);
  font-size: .92rem;
  letter-spacing: .16em;
  color: var(--sage-lt);
}
.hero-scope span { position: relative; }
.hero-scope span + span::before {
  content: "·";
  position: absolute;
  left: -18px;
  color: rgba(201, 162, 39, .7);
}
.hero-scope-note {
  color: var(--sage-lt);
  letter-spacing: .06em;
}
.hero-scope-note::before { content: none !important; }

.hero-stats {
  position: relative;
  margin-top: clamp(40px, 5vw, 72px);
  padding-bottom: clamp(38px, 4.5vw, 62px);
}


/* ==========================================================================
   通用区块
   ========================================================================== */
.section { padding: var(--pad) 0; }

.section-head { margin-bottom: clamp(48px, 6vw, 84px); }
.section-head .eyebrow { margin-bottom: 22px; }

.grid-12 {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(40px, 6vw, 100px);
}
.col-head { align-self: start; }

/* ---------- 困境 ---------- */
.trouble { background: var(--sand); }

.pain-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.pain-list li {
  padding: clamp(26px, 3vw, 38px) 0;
  border-top: 1px solid var(--line);
}
.pain-list li:last-child { border-bottom: 1px solid var(--line); }

.pain-idx {
  display: block;
  font-family: var(--serif);
  font-size: .82rem;
  letter-spacing: .18em;
  color: var(--sage);
  margin-bottom: 12px;
}
.pain-list h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 1.9vw, 1.62rem);
  font-weight: 600;
  line-height: 1.48;
  color: var(--forest);
}
.pain-list p {
  margin: 0;
  max-width: 32em;
  text-wrap: pretty;
  font-size: 1.02rem;
  line-height: 1.95;
  color: var(--sage);
}

/* ---------- 方法 ---------- */
.method {
  background: var(--forest);
  color: var(--sand);
  position: relative;
  overflow: hidden;
}
.method::before {
  content: "";
  position: absolute;
  left: 50%; top: -260px;
  width: 900px; height: 900px;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(201, 162, 39, .08), transparent 62%);
  pointer-events: none;
}
.method-head { position: relative; margin-bottom: clamp(52px, 7vw, 92px); }

.steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(24px, 3vw, 44px);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.step {
  position: relative;
  padding-top: 30px;
  border-top: 1px solid var(--line-inv);
}
.step::after {
  content: "";
  position: absolute;
  left: 0; top: -1px;
  width: 34px; height: 1px;
  background: var(--gold);
}
.js-ready .step::after {
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1s var(--ease) .2s;
}
.js-ready .step.in::after { transform: scaleX(1); }
.step-no {
  display: block;
  font-family: var(--num);
  font-size: .95rem;
  letter-spacing: .16em;
  color: var(--gold);
  margin-bottom: 18px;
}
.step h3 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.75vw, 1.5rem);
  font-weight: 600;
  color: var(--sand);
}
.step p {
  margin: 0;
  text-wrap: pretty;
  font-size: .98rem;
  line-height: 1.95;
  color: rgba(247, 244, 238, .68);
}

/* ---------- 专业能力 ---------- */
.expertise { background: var(--paper); }

.exp-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.exp {
  padding: clamp(30px, 3.4vw, 44px) clamp(24px, 3vw, 40px) clamp(30px, 3.4vw, 44px) 0;
  border-bottom: 1px solid var(--line);
}
.exp:nth-child(even) {
  padding-left: clamp(24px, 3vw, 40px);
  border-left: 1px solid var(--line);
}
.exp h3 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-size: clamp(1.22rem, 1.7vw, 1.45rem);
  font-weight: 600;
  color: var(--forest);
}
.exp p {
  margin: 0;
  max-width: 25em;
  text-wrap: pretty;
  font-size: 1.02rem;
  line-height: 1.95;
  color: var(--sage);
}

/* ---------- 数据墙 ---------- */
.proof {
  background: var(--forest-2);
  color: var(--sand);
  padding: clamp(62px, 7.5vw, 104px) 0;
}
.proof .eyebrow { margin-bottom: clamp(38px, 5vw, 62px); }

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(20px, 3vw, 40px);
}
.proof-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 6px;
}
.proof-num {
  font-family: var(--num);
  font-size: clamp(3.2rem, 6.4vw, 5.6rem);
  font-weight: 300;
  line-height: .95;
  color: var(--gold-lt);
  letter-spacing: -.01em;
}
.proof-unit {
  font-family: var(--num);
  font-size: clamp(.95rem, 1.5vw, 1.3rem);
  color: var(--gold);
  line-height: 1;
  transform: translateY(-.15em);
}
.proof-label {
  flex-basis: 100%;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-inv-soft);
  font-size: .88rem;
  letter-spacing: .1em;
  color: var(--sage-lt);
}

/* ---------- 合作方式 ---------- */
.models { background: var(--sand); }

.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.6vw, 36px);
}
.model {
  display: flex;
  flex-direction: column;
  padding: clamp(26px, 3vw, 38px) clamp(20px, 2.6vw, 34px) clamp(22px, 2.4vw, 30px);
  border-top: 1px solid var(--line);
  transition: background .45s var(--ease);
}
.model + .model { border-left: 1px solid var(--line); }


.model-tag {
  display: inline-block;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--sage);
  margin-bottom: 16px;
}
.model h3 {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-size: clamp(1.42rem, 2vw, 1.78rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--forest);
}
.model-for {
  margin: 0 0 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--sage);
}
.model-list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  flex: 1;
}
.model-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 12px;
  font-size: .98rem;
  line-height: 1.8;
  color: rgba(22, 48, 43, .78);
}
.model-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .78em;
  width: 5px; height: 1px;
  background: var(--gold);
}
.model-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  letter-spacing: .04em;
  color: var(--forest);
  border-bottom: 1px solid var(--line);
  padding-bottom: 5px;
  transition: color .3s var(--ease), border-color .3s var(--ease), gap .3s var(--ease);
}
.model-link span { transition: transform .3s var(--ease); }
.model-link:hover { color: var(--forest); border-color: var(--gold); }
.model-link:hover span { transform: translateX(4px); }

/* ---------- 案例 ---------- */
.cases { background: var(--paper); }

.section-head.split {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 40px;
}
.section-head.split .aside-note { margin: 0 0 10px; }

.case-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}
.case {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 4.4fr) minmax(0, 2.6fr);
  gap: clamp(20px, 3vw, 46px);
  align-items: start;
  padding: clamp(34px, 4vw, 54px) 0;
  border-bottom: 1px solid var(--line);
}

.case-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.case-region {
  font-family: var(--num);
  font-size: 1rem;
  letter-spacing: .18em;
  color: var(--sage);
}
.case-cat {
  font-size: .88rem;
  letter-spacing: .1em;
  color: var(--sage);
}
.case-body h3 {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 600;
  line-height: 1.45;
  color: var(--forest);
}
.case-body p {
  margin: 0;
  max-width: 36ch;
  text-wrap: pretty;
  font-size: 1.02rem;
  line-height: 1.95;
  color: var(--sage);
}
.case-figs {
  align-self: start;
  margin: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}
.case-figs div {
  padding-left: 16px;
  border-left: 1px solid var(--line);
}
.case-figs dt {
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--sage);
  margin-bottom: 5px;
}
.case-figs dd {
  margin: 0;
  font-family: var(--num);
  font-size: 1.42rem;
  color: var(--forest);
  letter-spacing: .02em;
}

/* ---------- 时间线 ---------- */
.timeline { background: var(--sand); }

.tl {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(22px, 3vw, 42px);
  position: relative;
  padding-top: 34px;
}
.tl::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 1px;
  background: var(--line);
}
.tl-item { position: relative; }
.tl-item::before {
  content: "";
  position: absolute;
  left: 0; top: -38px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--sand);
  border: 1px solid var(--gold);
  transform: translateY(-3px);
}
.js-ready .tl-item::before {
  transform: translateY(-3px) scale(0);
  transition: transform .55s var(--ease) .3s;
}
.js-ready .tl-item.in::before { transform: translateY(-3px) scale(1); }
.tl-item:first-child::before { background: var(--gold); }

.tl-when {
  display: block;
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--sage);
  margin-bottom: 14px;
}
.tl-item h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: clamp(1.22rem, 1.7vw, 1.45rem);
  font-weight: 600;
  color: var(--forest);
}
.tl-item p {
  margin: 0;
  text-wrap: pretty;
  font-size: .98rem;
  line-height: 1.95;
  color: var(--sage);
}

/* ---------- FAQ ---------- */
.faq { background: var(--paper); }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details {
  border-bottom: 1px solid var(--line);
}
.faq-list summary {
  position: relative;
  padding: 24px 48px 24px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: clamp(1.08rem, 1.5vw, 1.3rem);
  font-weight: 600;
  color: var(--forest);
  transition: color .3s var(--ease);
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "";
  position: absolute;
  right: 6px; top: 50%;
  width: 10px; height: 10px;
  margin-top: -7px;
  border-right: 1px solid var(--sage);
  border-bottom: 1px solid var(--sage);
  transform: rotate(45deg);
  transition: transform .35s var(--ease);
}
.faq-list details[open] summary::after {
  transform: rotate(-135deg);
}
.faq-list summary:hover { color: var(--gold-dim); }
.faq-list details p {
  margin: 0;
  padding: 0 clamp(0px, 3vw, 60px) 28px 0;
  max-width: 56ch;
  font-size: 1.02rem;
  line-height: 2;
  color: var(--sage);
}

/* ---------- 联系 ---------- */
.contact {
  background: var(--forest);
  color: var(--sand);
  padding: clamp(90px, 12vw, 170px) 0;
  position: relative;
  overflow: hidden;
}
.contact::before {
  content: "";
  position: absolute;
  right: -180px; bottom: -260px;
  width: 760px; height: 760px;
  background: radial-gradient(circle, rgba(201, 162, 39, .045), transparent 58%);
  pointer-events: none;
}

.contact-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4.6vw, 4.1rem);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: .02em;
  color: var(--sand);
}
.contact-lead {
  margin: 30px 0 0;
  max-width: 40ch;
  font-size: 1.05rem;
  line-height: 2;
  color: rgba(247, 244, 238, .74);
}
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: clamp(36px, 4.5vw, 56px);
}
.btn-solid.gold {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.42rem;
  letter-spacing: .03em;
  padding: 18px 44px;
  font-variant-numeric: tabular-nums;
}
.contact-note {
  margin: 30px 0 0;
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--sage-lt);
}

/* ---------- 页脚 ---------- */
.foot {
  background: var(--ink);
  color: var(--sage-lt);
  padding: clamp(56px, 7vw, 84px) 0 0;
}
.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) repeat(2, minmax(0, 2fr)) minmax(0, 3fr);
  gap: clamp(30px, 4vw, 60px);
  padding-bottom: clamp(44px, 6vw, 68px);
}
.foot-brand { display: flex; gap: 14px; align-items: flex-start; }
.foot-brand .brand-mark { color: var(--gold); margin-top: 4px; }
.foot-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--sand);
}
.foot-slogan {
  margin: 8px 0 0;
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--sage-lt);
}

.foot-col { display: flex; flex-direction: column; gap: 9px; }
.foot-col h3 {
  margin: 0 0 8px;
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--sage-lt);
}
.foot-col a {
  font-size: .92rem;
  color: rgba(247, 244, 238, .62);
  transition: color .3s var(--ease);
}
.foot-col a:hover { color: var(--gold-lt); }
.foot-col p {
  margin: 0;
  font-size: .84rem;
  color: var(--sage-lt);
}
.foot-col .foot-tel {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.62rem;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-lt);
}

.foot-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 24px 0 28px;
  border-top: 1px solid var(--line-inv-soft);
}
.foot-bottom p {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--sage-lt);
}

/* ==========================================================================
   动效
   ========================================================================== */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--d, 0s);
}
.js-ready .reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual {
    position: absolute;
    right: -80px;
    top: 50%;
    transform: translateY(-50%);
    width: 460px;
    opacity: .16;
    pointer-events: none;
  }
  .signal { width: 100%; }
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu:not([hidden]) { display: block; }

  .grid-12 { grid-template-columns: 1fr; gap: 46px; }
  .aside-note { max-width: 100%; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 40px 32px; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); gap: 46px 30px; }
  .model-grid { grid-template-columns: 1fr; }
  .model + .model { border-left: 0; }
  .tl { grid-template-columns: repeat(2, 1fr); gap: 40px 32px; }
  .section-head.split { grid-template-columns: 1fr; gap: 22px; align-items: start; }
  .case { grid-template-columns: 1fr; gap: 18px; }
  .case-figs { display: flex; gap: 34px; }
  .foot-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  body { font-size: 15px; }
  .hero {
    padding-top: 106px;
    min-height: auto;
    padding-bottom: 10px;
  }
  .hero-visual { display: none; }
  .hero-title { font-size: clamp(2.45rem, 10.5vw, 3.2rem); line-height: 1.14; }
  .hero-lead { font-size: .98rem; line-height: 1.95; }
  .hero-actions { gap: 11px; margin-top: 28px; }
  .hero-tagline {
    font-size: .92rem;
    letter-spacing: .02em;
    padding-left: 12px;
  }
  .hero-scope {
    gap: 8px 18px;
    font-size: .86rem;
    letter-spacing: .1em;
  }
  .hero-scope span + span::before { content: none; }
  .hero-actions .btn { padding: 14px 22px; font-size: .92rem; }
  .hero-stats { margin-top: 34px; }
  .exp-grid { grid-template-columns: 1fr; }
  .exp:nth-child(even) { padding-left: 0; border-left: 0; }
  .steps, .tl { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: 1fr; gap: 38px; }
  .foot-grid { grid-template-columns: 1fr; gap: 36px; }
  .contact-actions { flex-direction: column; align-items: flex-start; }
  .btn { width: 100%; justify-content: center; }
  .case-figs { flex-direction: column; gap: 16px; }
}

@media print {
  .js-ready .reveal { opacity: 1; transform: none; }
  .js-ready .step::after { transform: scaleX(1); }
  .js-ready .tl-item::before { transform: translateY(-3px) scale(1); }
  .nav, .mobile-menu { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .js-ready .step::after { transform: scaleX(1); transition: none; }
  .js-ready .tl-item::before { transform: translateY(-3px) scale(1); transition: none; }
  .signal .arcs path { animation: none; opacity: .8; }
  .btn, .model, .brand-mark { transition: none; }
}