/* =========================================================
   苏州集和家具设计有限公司 — 官网样式
   主题：深炭 · 暖白 · 金
   ========================================================= */

:root {
  --ink: #17160f;
  --ink-2: #24221a;
  --bg: #faf8f3;
  --bg-alt: #f1ede4;
  --card: #ffffff;
  --gold: #b98a2f;
  --gold-2: #d6a94c;
  --gold-soft: rgba(185, 138, 47, .12);
  --text: #2b2a25;
  --muted: #6f6a5e;
  --line: rgba(23, 22, 15, .1);
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --shadow: 0 20px 50px -24px rgba(23, 22, 15, .28);
  --radius: 14px;
  --nav-h: 76px;
}

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

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

body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* ---------- 滚动显现动画（html.js 下生效，JS 未加载时内容始终可见） ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease, transform .8s ease;
}
html.js .reveal.is-visible { opacity: 1; transform: none; }

/* =========================================================
   导航栏
   ========================================================= */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(23, 22, 15, .96);
  color: #fff;
  transition: box-shadow .35s ease;
}
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(0,0,0,.28); }

.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-logo {
  display: block;
  height: 38px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}
/* 深色背景上的品牌标识：纯黑 logo 反白呈现 */
.site-header .brand-logo { filter: invert(1); }
.site-header .brand-logo-word { height: 32px; }
.footer-brand-logo .brand-logo {
  height: 46px;
  filter: invert(1);
}

.brand-divider {
  width: 1px;
  height: 28px;
  background: rgba(255,255,255,.45);
  flex-shrink: 0;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 2px;
  color: #fff;
}
.brand-text small {
  font-size: 10px;
  letter-spacing: 2.5px;
  color: rgba(255,255,255,.6);
  margin-top: 3px;
}

.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  padding: 8px 11px;
  font-size: 14.5px;
  letter-spacing: 1px;
  color: rgba(255,255,255,.82);
  transition: color .25s ease;
}
.nav-link:hover,
.nav-link.is-active { color: var(--gold-2); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 11px; right: 11px; bottom: 4px;
  height: 2px;
  background: var(--gold-2);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.nav-link:hover::after,
.nav-link.is-active::after { transform: scaleX(1); }

.nav-link.nav-cta {
  margin-left: 10px;
  padding: 9px 22px;
  border: 1px solid rgba(255,255,255,.5);
  border-radius: 999px;
  color: #fff;
  transition: background .3s ease, color .3s ease, border-color .3s ease;
}
.nav-link.nav-cta::after { display: none; }
.nav-link.nav-cta:hover {
  background: var(--gold);
  border-color: var(--gold);
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: #fff;
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   主体大图 + 首屏文案区
   ========================================================= */
.hero { background: var(--bg); }
/* 裁掉原图上方约 10%（原图 1717×916，可见区域 1717×824），
   图片保持完整、无遮罩，仅隐藏顶部平淡区域 */
.hero-bg {
  overflow: hidden;
  aspect-ratio: 1717 / 824;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center bottom;
}

.hero-intro {
  background: var(--bg);
  padding: 96px 0 100px;
  text-align: center;
}
.hero-content { max-width: 880px; }

.hero-eyebrow {
  display: inline-block;
  font-size: 15px;
  letter-spacing: 4px;
  color: var(--gold);
  margin-bottom: 26px;
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 3px;
  color: var(--ink);
}
.hero-title span { display: block; font-size: .6em; font-weight: 500; color: #7b7566; margin-top: 8px; }

.hero-slogan {
  margin-top: 26px;
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 400;
  letter-spacing: 6px;
  color: var(--ink);
}
.hero-slogan::before,
.hero-slogan::after {
  content: "—";
  color: var(--gold);
  margin: 0 14px;
  letter-spacing: 0;
}

.hero-desc {
  margin-top: 22px;
  font-size: 16px;
  line-height: 2;
  color: var(--muted);
  letter-spacing: 1px;
}

.hero-actions { margin-top: 40px; display: flex; gap: 18px; flex-wrap: wrap; justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 15px;
  letter-spacing: 2px;
  border-radius: 999px;
  transition: transform .25s ease, background .3s ease, color .3s ease, box-shadow .3s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-gold {
  background: var(--gold);
  color: #fff;
  box-shadow: 0 12px 28px -12px rgba(185,138,47,.7);
}
.btn-gold:hover { background: var(--gold-2); }

/* 浅色背景上的描边按钮 */
.btn-ghost {
  border: 1px solid rgba(23,22,15,.35);
  color: var(--ink);
}
.btn-ghost:hover { background: rgba(23,22,15,.06); border-color: var(--ink); }

.btn-lg { padding: 16px 44px; }

.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 62px;
  border-top: 1px solid var(--line);
  padding-top: 30px;
  flex-wrap: wrap;
  justify-content: center;
}
.stat {
  min-width: 150px;
  padding-right: 40px;
  margin-right: 40px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; margin-right: 0; }
.stat-num {
  font-family: var(--serif);
  font-size: clamp(30px, 3.4vw, 44px);
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 1px;
}
.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--muted);
}

/* =========================================================
   通用 Section
   ========================================================= */
.section { padding: 110px 0; }

.section-head { max-width: 780px; }
.section-head.center { margin: 0 auto; text-align: center; }

.section-eyebrow {
  font-size: 13px;
  letter-spacing: 5px;
  color: var(--gold);
  margin-bottom: 18px;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}
.section-sub {
  margin-top: 18px;
  color: var(--muted);
  font-size: 15.5px;
}

/* ---------- 关于我们 ---------- */
.about { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 60px;
  margin-top: 56px;
  align-items: start;
}

.about-copy .lead {
  font-size: 20px;
  line-height: 1.9;
  color: var(--ink);
  font-weight: 500;
}
.about-copy .lead em { font-style: normal; color: var(--gold); font-weight: 700; }
.about-copy p { margin-top: 18px; color: #55513f; font-size: 15.5px; }
.about-copy p strong { color: var(--ink); }
.about-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
}
.about-brand img {
  height: 42px;
  width: auto;
}
.signature {
  font-family: var(--serif);
  color: var(--gold) !important;
  letter-spacing: 2px;
  font-size: 16px !important;
  margin-top: 0 !important;
}

.about-aside { display: grid; gap: 20px; }
.about-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}
.about-card:hover { transform: translateY(-4px); box-shadow: 0 26px 56px -24px rgba(23,22,15,.34); }
.about-card-num {
  font-family: var(--serif);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 2px;
}
.about-card h3 { font-size: 19px; color: var(--ink); margin: 8px 0 6px; }
.about-card p { font-size: 14px; color: var(--muted); }

/* ---------- 全链路服务 ---------- */
.service { background: var(--bg-alt); }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.service-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 26px;
  text-align: center;
  transition: transform .3s ease, box-shadow .3s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--gold-soft);
  color: var(--gold);
  margin-bottom: 20px;
}
.service-icon svg { width: 30px; height: 30px; }
.service-card h3 { font-size: 19px; color: var(--ink); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--muted); line-height: 1.85; }

/* ---------- 服务标准 ---------- */
.standard { background: var(--ink); color: #fff; }
.standard .section-title { color: #fff; }
.standard .section-sub { color: rgba(255,255,255,.6); }
.standard .section-eyebrow { color: var(--gold-2); }

.standard-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 70px;
  border-top: 1px solid rgba(255,255,255,.16);
  border-bottom: 1px solid rgba(255,255,255,.16);
}
.standard-item {
  padding: 52px 44px;
  text-align: center;
  border-left: 1px solid rgba(255,255,255,.16);
}
.standard-item:first-child { border-left: 0; }
.standard-num {
  font-family: var(--serif);
  font-size: 88px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-2);
  display: inline-block;
  vertical-align: middle;
  letter-spacing: -4px;
}
.standard-unit {
  font-size: 16px;
  letter-spacing: 2px;
  color: rgba(255,255,255,.7);
  margin-left: 10px;
}
.standard-item h3 {
  font-size: 22px;
  letter-spacing: 4px;
  margin: 18px 0 12px;
  color: #fff;
}
.standard-item p { font-size: 14px; color: rgba(255,255,255,.6); }

/* ---------- 业务场景 ---------- */
.scenario { background: var(--bg); }
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-top: 56px;
}
.scenario-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 22px;
  text-align: center;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease, color .3s ease;
}
.scenario-card:hover {
  transform: translateY(-6px);
  background: var(--ink);
  box-shadow: var(--shadow);
}
.scenario-card:hover .scenario-num { color: var(--gold-2); }
.scenario-card:hover h3 { color: #fff; }
.scenario-card:hover p { color: rgba(255,255,255,.7); }
.scenario-num {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--gold);
}
.scenario-card h3 { font-size: 19px; color: var(--ink); margin: 10px 0 10px; }
.scenario-card p { font-size: 13.5px; color: var(--muted); line-height: 1.85; }

/* ---------- 智造实力 ---------- */
.manufacture { background: var(--bg-alt); }
.manufacture-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 56px;
}
.manufacture-base {
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius);
  padding: 40px 38px;
  position: relative;
  overflow: hidden;
  transition: transform .3s ease;
}
.manufacture-base:hover { transform: translateY(-4px); }
.manufacture-base::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 140px; height: 140px;
  background: radial-gradient(circle, rgba(214,169,76,.28), transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}
.base-tag {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--gold-2);
  border: 1px solid rgba(214,169,76,.5);
  border-radius: 999px;
  padding: 4px 14px;
}
.manufacture-base h3 {
  font-family: var(--serif);
  font-size: 26px;
  margin: 18px 0 10px;
}
.manufacture-base p { font-size: 14.5px; color: rgba(255,255,255,.68); }

.manufacture-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 28px;
}
.mf-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px;
  text-align: center;
  transition: transform .3s ease, box-shadow .3s ease;
}
.mf-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.mf-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  border-radius: 14px;
  background: var(--gold-soft);
  color: var(--gold);
  margin-bottom: 16px;
}
.mf-icon svg { width: 28px; height: 28px; }
.mf-item h4 { font-size: 17px; color: var(--ink); margin-bottom: 8px; }
.mf-item p { font-size: 13.5px; color: var(--muted); }

/* ---------- 标杆客户 ---------- */
.clients { background: var(--bg); }
.clients-logo {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin-top: 56px;
}
.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 84px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 1px;
  color: #5b574a;
  transition: color .3s ease, border-color .3s ease, transform .3s ease;
}
.client-logo:hover { color: var(--gold); border-color: var(--gold); transform: translateY(-3px); }

.clients-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  background: var(--ink);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
}
.cs-item { border-left: 1px solid rgba(255,255,255,.14); }
.cs-item:first-child { border-left: 0; }
.cs-num {
  font-family: var(--serif);
  font-size: clamp(32px, 3.6vw, 48px);
  font-weight: 700;
  color: var(--gold-2);
}
.cs-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 3px;
  color: rgba(255,255,255,.62);
}

/* ---------- 客户案例 ---------- */
.cases { background: var(--bg-alt); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.case-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform .3s ease, box-shadow .3s ease;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.case-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-alt);
}
.case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.case-card:hover .case-media img { transform: scale(1.06); }
.case-body {
  padding: 22px 24px 24px;
  background: var(--card);
}
.case-body h3 {
  font-family: var(--serif);
  font-size: 19px;
  color: var(--ink);
  letter-spacing: 1px;
}
.case-body p {
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 6px;
  line-height: 1.8;
}
.case-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--gold);
}
.case-more::after {
  content: "→";
  transition: transform .3s ease;
}
.case-card:hover .case-more::after { transform: translateX(5px); }

/* ---------- 客户案例灯箱 ---------- */
.case-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(16, 15, 11, .95);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.case-lightbox.is-open { display: flex; }
.lightbox-head {
  width: min(1000px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.lightbox-title {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 2px;
  color: var(--gold-2);
}
.lightbox-close {
  background: none;
  border: 0;
  color: #fff;
  font-size: 36px;
  line-height: 1;
  cursor: pointer;
  padding: 4px 10px;
  transition: color .25s ease, transform .25s ease;
}
.lightbox-close:hover { color: var(--gold-2); transform: rotate(90deg); }
.lightbox-stage {
  position: relative;
  width: min(1000px, 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-figure { max-width: 100%; }
.lightbox-figure img {
  display: block;
  max-width: min(1000px, 88vw);
  max-height: 62vh;
  object-fit: contain;
  border-radius: 8px;
  background: #000;
}
.lightbox-count {
  text-align: center;
  color: rgba(255,255,255,.72);
  font-size: 13px;
  letter-spacing: 2px;
  margin-top: 10px;
}
.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.28);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .25s ease, border-color .25s ease;
}
.lightbox-nav:hover { background: var(--gold); border-color: var(--gold); }
.lightbox-nav.prev { left: -6px; }
.lightbox-nav.next { right: -6px; }
.lightbox-thumbs {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  max-width: min(1000px, 100%);
  overflow-x: auto;
  padding: 4px 4px 8px;
}
.lightbox-thumb {
  flex-shrink: 0;
  width: 74px;
  height: 56px;
  object-fit: cover;
  border-radius: 6px;
  cursor: pointer;
  border: 2px solid transparent;
  opacity: .6;
  transition: border-color .25s ease, opacity .25s ease;
}
.lightbox-thumb:hover { opacity: 1; }
.lightbox-thumb.is-active { border-color: var(--gold-2); opacity: 1; }

/* ---------- 企业文化 ---------- */
.culture { background: var(--bg); }
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.culture-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 38px 32px;
  transition: transform .3s ease, box-shadow .3s ease;
}
.culture-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.culture-tag {
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--gold);
  background: var(--gold-soft);
  border-radius: 999px;
  padding: 4px 14px;
}
.culture-card h3 {
  font-family: var(--serif);
  font-size: 22px;
  color: var(--ink);
  margin: 18px 0 12px;
}
.culture-card p { font-size: 14.5px; color: var(--muted); }

/* ---------- 联系 ---------- */
.contact { background: var(--ink); }
.contact-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 60px;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(214,169,76,.16), transparent 55%),
    linear-gradient(115deg, #1d1c14, #26241b);
  border: 1px solid rgba(214,169,76,.25);
  border-radius: 20px;
  color: #fff;
}
.contact-title {
  font-family: var(--serif);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.5;
  margin: 10px 0 14px;
}
.contact-desc { color: rgba(255,255,255,.7); font-size: 15px; }
.contact-actions { display: flex; gap: 16px; flex-wrap: wrap; flex-shrink: 0; }
.contact-actions .btn-gold { box-shadow: 0 14px 32px -12px rgba(185,138,47,.8); }
/* 深色卡片上的描边按钮：浅色边框 + 白色文字，保证可见 */
.contact-actions .btn-ghost {
  border-color: rgba(255,255,255,.5);
  color: #fff;
}
.contact-actions .btn-ghost:hover {
  background: rgba(255,255,255,.12);
  border-color: #fff;
  color: #fff;
}

/* ---------- 页脚 ---------- */
.site-footer { background: #11100b; color: rgba(255,255,255,.72); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 48px;
}
.footer-brand p { margin-top: 20px; font-size: 13.5px; color: rgba(255,255,255,.5); max-width: 300px; line-height: 1.9; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 26px; height: 2px;
  background: var(--gold);
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,.6);
  margin-bottom: 12px;
  transition: color .25s ease, padding-left .25s ease;
}
.footer-col a:hover { color: var(--gold-2); padding-left: 6px; }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,.6); margin-bottom: 12px; }
.footer-contact a {
  display: inline;
  margin: 0;
  color: inherit;
  border-bottom: 1px solid rgba(255,255,255,.28);
  transition: color .25s ease, border-color .25s ease;
}
.footer-contact a:hover { color: var(--gold-2); border-color: var(--gold-2); padding-left: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,.45);
}
.footer-motto { color: var(--gold-2); letter-spacing: 2px; }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(3, 1fr); }
  .clients-logo { grid-template-columns: repeat(3, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  .section { padding: 80px 0; }

  .main-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100vh; height: 100svh;
    width: min(320px, 82vw);
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    gap: 6px;
    background: rgba(20,19,14,.97);
    padding: 100px 30px 40px;
    transform: translateX(100%);
    transition: transform .4s ease;
    box-shadow: -20px 0 60px rgba(0,0,0,.35);
  }
  .main-nav.is-open { transform: translateX(0); }
  .nav-link { font-size: 16px; padding: 12px 8px; text-align: center; }
  .nav-link.nav-cta { margin: 16px auto 0; }

  .nav-toggle { display: flex; z-index: 110; }

  .about-grid { grid-template-columns: 1fr; }
  .contact-card { flex-direction: column; align-items: flex-start; padding: 40px 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .hero-title { letter-spacing: 1px; }
  .hero-slogan { letter-spacing: 3px; }
  .stat { min-width: 46%; margin-right: 0; padding-right: 0; border-right: 0; }
  .stat:nth-child(even) { border-right: 0; }

  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .manufacture-grid { grid-template-columns: 1fr; }
  .manufacture-features { grid-template-columns: 1fr; }
  .clients-logo { grid-template-columns: 1fr 1fr; }
  .clients-stats { grid-template-columns: 1fr 1fr; gap: 26px 0; }
  .cs-item { border-left: 0; }
  .culture-grid { grid-template-columns: 1fr; }
  .standard-grid { grid-template-columns: 1fr; }
  .standard-item { border-left: 0; border-top: 1px solid rgba(255,255,255,.16); padding: 40px 24px; }
  .standard-item:first-child { border-top: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 520px) {
  .service-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .lightbox-thumb { width: 60px; height: 46px; }
  .hero-actions .btn { width: 100%; }
  .site-header .brand-logo { height: 30px; }
  .site-header .brand-logo-word { height: 26px; }
  .brand-text small { display: none; }
}