/* ============================================================
   木根门窗 MUGEN — 官网改版演示稿
   设计语言：墨色 × MUGEN绿 × 暖白纸色，编辑风排版
   ============================================================ */

:root {
  --ink: #14171a;
  --ink-2: #1c2126;
  --ink-3: #242a30;
  --paper: #f7f5f0;
  --paper-2: #efece3;
  --white: #ffffff;
  --green: #1e8a4e;
  --green-dark: #166b3c;
  --green-bright: #35b26c;
  --green-deep: #0f3d24;
  --brass: #a8865a;
  --text: #2a2d30;
  --text-soft: #55595e;
  --muted: #8a8f94;
  --line: #e2ddd2;
  --line-dark: #2e353c;
  --radius: 4px;
  --shadow: 0 20px 60px -24px rgba(20, 23, 26, 0.28);
  --font-display: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
}

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

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding-inline: clamp(20px, 4.5vw, 44px);
}

section { scroll-margin-top: 84px; }

/* ---------- 通用排版 ---------- */

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--green);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--green);
}
.on-dark .kicker { color: var(--green-bright); }
.on-dark .kicker::before { background: var(--green-bright); }

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.on-dark .section-title { color: var(--paper); }

.section-lead {
  margin-top: 18px;
  max-width: 620px;
  color: var(--text-soft);
  font-size: clamp(15px, 1.6vw, 17px);
}
.on-dark .section-lead { color: #aab1b7; }

.section-pad { padding-block: clamp(72px, 10vw, 128px); }

/* ---------- 滚动浮现 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* 打印 / 无 JS 环境兜底：内容永远可见 */
@media print {
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- 顶栏 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(247, 245, 240, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px -20px rgba(20, 23, 26, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}

.logo img {
  height: 34px;
  width: auto;
  mix-blend-mode: multiply; /* JPEG 白底融入纸色页头 */
}

.main-nav ul {
  display: flex;
  gap: clamp(18px, 2.6vw, 34px);
}
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 6px 2px;
  position: relative;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.main-nav a:hover::after { transform: scaleX(1); }

.header-cta {
  display: flex;
  align-items: center;
  gap: 18px;
}
.header-phone {
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.header-phone span {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.14em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease,
    transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }

.btn-solid {
  background: var(--green);
  color: #fff;
}
.btn-solid:hover { background: var(--green-dark); }

.btn-ghost {
  border: 1px solid rgba(247, 245, 240, 0.4);
  color: var(--paper);
}
.btn-ghost:hover { border-color: var(--paper); background: rgba(255,255,255,0.06); }

.btn-ghost-dark {
  border: 1px solid var(--ink);
  color: var(--ink);
}
.btn-ghost-dark:hover { background: var(--ink); color: var(--paper); }

.btn-sm { padding: 10px 20px; font-size: 14px; }

/* 汉堡按钮（移动端） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.3s ease, opacity 0.3s 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 {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, rgba(30, 138, 78, 0.14), transparent 65%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
  padding-block: clamp(72px, 10vw, 120px);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--green-bright);
  font-weight: 600;
  margin-bottom: 26px;
}
.hero-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--green-bright);
  border-radius: 50%;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.3rem, 5.4vw, 4rem);
  line-height: 1.28;
  letter-spacing: 0.03em;
}
.hero h1 em {
  font-style: normal;
  color: var(--green-bright);
}

.hero-sub {
  margin-top: 26px;
  max-width: 520px;
  color: #b9bfc5;
  font-size: clamp(15px, 1.7vw, 17px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line-dark);
  font-size: 13.5px;
  color: #9aa1a8;
  letter-spacing: 0.04em;
}
.hero-trust li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-trust li::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--brass);
  border-radius: 50%;
}

.hero-figure {
  position: relative;
  margin-block: 10px;
}
.hero-figure img {
  width: 100%;
  height: clamp(340px, 46vw, 520px);
  object-fit: cover;
  border-radius: var(--radius);
}
.hero-figure::after {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  z-index: -1;
}
.hero-figure figcaption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  background: rgba(20, 23, 26, 0.82);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  padding: 10px 18px;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: #cdd3d8;
  border-left: 2px solid var(--green-bright);
}

/* 数据条 */
.stats-strip {
  background: var(--ink-2);
  border-top: 1px solid var(--line-dark);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: 30px clamp(16px, 2.5vw, 36px);
  border-left: 1px solid var(--line-dark);
}
.stat:first-child { border-left: none; }
.stat b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 600;
  color: var(--paper);
  line-height: 1.2;
}
.stat b small {
  font-size: 0.55em;
  color: var(--brass);
  margin-left: 4px;
  letter-spacing: 0.08em;
}
.stat span {
  font-size: 13px;
  color: #8f969c;
  letter-spacing: 0.1em;
}

/* ---------- 品牌 ---------- */

.brand-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(40px, 6vw, 90px);
  margin-top: clamp(36px, 5vw, 60px);
}

.brand-copy p {
  margin-bottom: 1.2em;
  color: var(--text-soft);
  font-size: 16px;
}
.brand-copy p strong { color: var(--ink); font-weight: 600; }

.brand-quote {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  color: var(--ink);
  line-height: 1.7;
  padding-left: 22px;
  border-left: 3px solid var(--green);
  margin: 28px 0;
}

.beauty-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.beauty {
  background: var(--paper);
  padding: clamp(24px, 3vw, 38px);
  transition: background 0.3s ease;
}
.beauty:hover { background: var(--white); }
.beauty i {
  display: block;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--brass);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.beauty h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.beauty p { font-size: 14px; color: var(--text-soft); }

.partners {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: 34px;
  border-top: 1px solid var(--line);
}
.partners-label {
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 20px;
}
.partners ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 14px;
}
.partners li {
  font-size: 14px;
  color: var(--text-soft);
  border: 1px solid var(--line);
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--white);
  letter-spacing: 0.04em;
}

/* ---------- 产品 ---------- */

.section-products { background: var(--paper-2); }

.products-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(18px, 2.6vw, 30px);
  margin-top: clamp(40px, 5vw, 56px);
}

.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.product-media {
  background: linear-gradient(160deg, #f2f0ea 0%, #e6e2d8 100%);
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 250px;
}
.product-media img {
  max-height: 100%;
  width: auto;
  object-fit: contain;
  transition: transform 0.4s ease;
}
.product-card:hover .product-media img { transform: scale(1.05); }

.product-body {
  padding: 24px 26px 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.product-tag {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--green);
  font-weight: 600;
  margin-bottom: 10px;
}
.product-body h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
}
.product-body p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-soft);
  flex: 1;
}
.product-link {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.product-link::after { content: "→"; transition: transform 0.25s ease; }
.product-link:hover { color: var(--green); }
.product-link:hover::after { transform: translateX(4px); }

.product-note {
  margin-top: 34px;
  font-size: 13.5px;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.04em;
}

/* ---------- 实测性能（暗色） ---------- */

.section-performance {
  background: var(--ink);
  color: var(--paper);
}

.perf-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
  margin-top: clamp(40px, 5vw, 60px);
}

.perf-figure {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 30px;
}
.perf-figure::before {
  content: "";
  position: absolute;
  inset: 8%;
  background: radial-gradient(circle, rgba(53, 178, 108, 0.16), transparent 70%);
}
.perf-figure img {
  position: relative;
  max-height: 460px;
  width: auto;
  filter: drop-shadow(0 30px 50px rgba(0, 0, 0, 0.45));
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.spec {
  background: var(--ink);
  padding: clamp(20px, 2.6vw, 30px);
}
.spec b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.3vw, 1.75rem);
  font-weight: 600;
  color: var(--paper);
  line-height: 1.25;
}
.spec b small {
  font-size: 0.55em;
  color: var(--brass);
  letter-spacing: 0.05em;
  margin-left: 3px;
}
.spec b.spec-sm {
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.6;
  white-space: nowrap;
}
.spec span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: #8f969c;
}

.perf-features {
  margin-top: 30px;
  display: grid;
  gap: 12px;
}
.perf-features li {
  display: flex;
  gap: 12px;
  font-size: 14.5px;
  color: #b9bfc5;
  line-height: 1.65;
}
.perf-features li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-bright);
  margin-top: 9px;
}

.perf-source {
  margin-top: 26px;
  font-size: 12.5px;
  color: #6d747a;
  letter-spacing: 0.06em;
}

/* 为严寒而生 */
.cold-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 5vw, 70px);
  align-items: center;
  margin-top: clamp(64px, 8vw, 100px);
  padding-top: clamp(48px, 6vw, 72px);
  border-top: 1px solid var(--line-dark);
}
.cold-row img {
  width: 100%;
  height: clamp(260px, 30vw, 360px);
  object-fit: cover;
  border-radius: var(--radius);
}
.cold-copy h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 600;
  color: var(--paper);
  line-height: 1.4;
}
.cold-copy p {
  margin-top: 18px;
  color: #aab1b7;
  font-size: 15.5px;
}
.cold-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}
.cold-tags li {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--green-bright);
  border: 1px solid rgba(53, 178, 108, 0.4);
  padding: 7px 16px;
  border-radius: 999px;
}

/* ---------- 工程案例 ---------- */

.cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: clamp(150px, 17vw, 220px);
  gap: clamp(12px, 1.8vw, 20px);
  margin-top: clamp(40px, 5vw, 56px);
}
.case-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}
.case-item:first-child {
  grid-column: span 2;
  grid-row: span 2;
}
.case-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.case-item:hover img { transform: scale(1.06); }
.case-item figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 14px 18px;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: #e8e4dc;
  background: linear-gradient(transparent, rgba(20, 23, 26, 0.75));
}

.cases-note {
  margin-top: 30px;
  text-align: center;
  font-size: 13.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* ---------- 服务流程 ---------- */

.section-service { background: var(--white); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(40px, 5vw, 56px);
}
.step {
  background: var(--white);
  padding: clamp(24px, 3vw, 36px) clamp(20px, 2.6vw, 30px);
  transition: background 0.3s ease;
}
.step:hover { background: var(--paper); }
.step i {
  display: block;
  font-style: normal;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--line);
  font-weight: 600;
  line-height: 1;
  margin-bottom: 16px;
  transition: color 0.3s ease;
}
.step:hover i { color: var(--green); }
.step h3 {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.step p { font-size: 13.5px; color: var(--text-soft); }

/* ---------- 预约测量 ---------- */

.section-booking { background: var(--paper-2); }

.booking-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: start;
  margin-top: clamp(40px, 5vw, 56px);
}

.booking-intro p {
  color: var(--text-soft);
  font-size: 15.5px;
  margin-bottom: 1.1em;
}
.booking-steps {
  margin-top: 30px;
  display: grid;
  gap: 0;
}
.booking-steps li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--text-soft);
}
.booking-steps li:last-child { border-bottom: none; }
.booking-steps b {
  flex: none;
  font-family: var(--font-display);
  color: var(--brass);
  font-weight: 600;
}
.booking-phone {
  margin-top: 34px;
  padding: 24px 28px;
  background: var(--ink);
  border-radius: var(--radius);
  color: var(--paper);
}
.booking-phone span {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: #8f969c;
  margin-bottom: 6px;
}
.booking-phone a {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
  font-weight: 600;
  color: var(--paper);
  letter-spacing: 0.04em;
}
.booking-phone a:hover { color: var(--green-bright); }

/* 表单卡片 */
.form-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(28px, 4vw, 44px);
  box-shadow: var(--shadow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.field { margin-bottom: 22px; }
.field > label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.field > label small {
  font-weight: 400;
  color: var(--muted);
  margin-left: 6px;
}

.field input[type="text"],
.field input[type="tel"],
.field input[type="number"],
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--paper);
  transition: border-color 0.25s ease, background 0.25s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--green);
  background: var(--white);
}
.field textarea { resize: vertical; min-height: 84px; }

.field input.is-invalid { border-color: #c0392b; background: #fdf3f2; }
.field-error {
  display: none;
  font-size: 12.5px;
  color: #c0392b;
  margin-top: 6px;
}
.field-error.is-visible { display: block; }

/* chip 选择器 */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chips label {
  position: relative;
  cursor: pointer;
}
.chips input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.chips span {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--text-soft);
  background: var(--paper);
  transition: all 0.2s ease;
  user-select: none;
  -webkit-user-select: none;
}
.chips input:checked + span {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.chips input:focus-visible + span {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.form-submit {
  width: 100%;
  margin-top: 6px;
}
.form-hint {
  margin-top: 16px;
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.03em;
}

/* 预评估单（提交后） */
.precheck { display: none; }
.precheck.is-visible { display: block; }
.form-card.is-hidden .booking-form { display: none; }

.precheck-head {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.precheck-head strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--ink);
}
.precheck-head span {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.precheck-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.precheck-col h4 {
  font-size: 13px;
  letter-spacing: 0.18em;
  margin-bottom: 14px;
  font-weight: 600;
}
.precheck-col.confirmed h4 { color: var(--green); }
.precheck-col.pending h4 { color: var(--brass); }
.precheck-col li {
  font-size: 14px;
  color: var(--text-soft);
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  display: flex;
  gap: 8px;
  line-height: 1.5;
}
.precheck-col li b { color: var(--ink); font-weight: 600; flex: none; }

.precheck-actions {
  display: flex;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.precheck-actions .btn { flex: 1; min-width: 160px; white-space: nowrap; }

.precheck-note {
  margin-top: 18px;
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

/* ---------- 门店与联系 ---------- */

.section-contact {
  background: var(--ink);
  color: var(--paper);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  margin-top: clamp(40px, 5vw, 56px);
}
.store {
  background: var(--ink);
  padding: clamp(26px, 3.2vw, 38px);
}
.store i {
  display: block;
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--brass);
  margin-bottom: 14px;
}
.store h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--paper);
  margin-bottom: 10px;
  line-height: 1.5;
}
.store p {
  font-size: 14px;
  color: #9aa1a8;
  margin-bottom: 14px;
  line-height: 1.7;
}
.store a {
  font-size: 15px;
  font-weight: 600;
  color: var(--green-bright);
  letter-spacing: 0.04em;
}
.store a:hover { text-decoration: underline; }

.contact-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  margin-top: clamp(40px, 5vw, 56px);
  padding-top: 34px;
  border-top: 1px solid var(--line-dark);
}
.hotline span {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.22em;
  color: #8f969c;
  margin-bottom: 8px;
}
.hotline a {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 600;
  color: var(--paper);
  letter-spacing: 0.05em;
}
.hotline a:hover { color: var(--green-bright); }

.wechat {
  display: flex;
  align-items: center;
  gap: 18px;
}
.wechat img {
  width: 96px;
  height: 96px;
  border-radius: var(--radius);
  border: 4px solid var(--white);
}
.wechat p {
  font-size: 13.5px;
  color: #9aa1a8;
  max-width: 150px;
  line-height: 1.7;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: #0e1113;
  color: #7a8188;
  font-size: 13px;
  padding-block: 30px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 30px;
  flex-wrap: wrap;
}
.site-footer a { color: #9aa1a8; }
.site-footer a:hover { color: var(--paper); }
.footer-demo {
  font-size: 12px;
  color: #565d63;
  letter-spacing: 0.05em;
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .hero-grid,
  .brand-grid,
  .perf-grid,
  .cold-row,
  .booking-grid {
    grid-template-columns: 1fr;
  }

  .perf-figure { order: -1; }
  .perf-figure img { max-height: 320px; }

  .product-grid { grid-template-columns: 1fr 1fr; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { border-left: none; border-top: 1px solid var(--line-dark); }
  .stat:nth-child(-n + 2) { border-top: none; }
  .stat:nth-child(even) { border-left: 1px solid var(--line-dark); }

  .cases-grid {
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: clamp(160px, 26vw, 240px);
  }
  .case-item:first-child { grid-column: span 2; grid-row: span 1; }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px -24px rgba(20, 23, 26, 0.3);
    transform: translateY(-130%);
    transition: transform 0.35s ease;
    z-index: 99;
  }
  .main-nav.is-open { transform: none; }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 10px 24px 20px;
  }
  .main-nav a {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
  }
  .main-nav li:last-child a { border-bottom: none; }

  .nav-toggle { display: flex; }
  .header-phone { display: none; }
  .header-cta .btn { padding: 10px 18px; font-size: 14px; }

  .product-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .precheck-cols { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }

  .hero-figure::after { display: none; }

  /* 移动端整体收紧上下留白，减少滚动高度 */
  .section-pad { padding-block: clamp(48px, 9vw, 96px); }

  /* 品牌段收尾句在小屏偏填充，隐藏以精简阅读 */
  .brand-copy-more { display: none; }

  /* 预约区在移动端高度压缩：表单上方的引导块尽量紧凑 */
  .section-booking { padding-block: clamp(44px, 8vw, 72px); }
  .booking-grid { gap: 26px; margin-top: 24px; }
  .booking-intro p { margin-bottom: 0.9em; font-size: 15px; }
  .booking-steps { margin-top: 18px; }
  .booking-steps li { padding: 11px 0; font-size: 14px; }
  .booking-phone { margin-top: 20px; padding: 16px 18px; }
  .form-card { padding: 20px 16px; }
}