/* ==========================================================================
   修路人 xiuluren.cn — 上海闵思建设工程有限公司
   品牌色：沥青黑 + 安全橙 + 工程黄
   ========================================================================== */

:root {
  --ink:        #12151A;
  --ink-2:      #1E242C;
  --ink-3:      #39414C;
  --accent:     #FF6B00;
  --accent-2:   #FFA300;
  --accent-dk:  #D95400;
  --sand:       #F5F6F8;
  --sand-2:     #EDEFF2;
  --line:       #E2E6EA;
  --text:       #171B21;
  --muted:      #616A75;
  --muted-2:    #8A939E;
  --white:      #FFFFFF;

  --radius:     4px;
  --radius-lg:  10px;
  --shadow-sm:  0 1px 3px rgba(18, 21, 26, .08);
  --shadow-md:  0 6px 22px rgba(18, 21, 26, .10);
  --shadow-lg:  0 18px 48px rgba(18, 21, 26, .16);

  --container:  1200px;
  --header-h:   76px;

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
          "Source Han Sans CN", "Noto Sans CJK SC", -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 96px; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; }
p { margin: 0; }
button { font-family: inherit; }

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

.section { padding: 88px 0; }
.section--sand { background: var(--sand); }
.section--ink { background: var(--ink); color: #E8EBEF; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--accent);
  margin-bottom: 16px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 3px;
  background: var(--accent);
  border-radius: 2px;
}
.eyebrow--light { color: var(--accent-2); }
.eyebrow--light::before { background: var(--accent-2); }

.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 {
  font-size: clamp(26px, 3.6vw, 38px);
  letter-spacing: -.01em;
  margin-bottom: 16px;
}
.section-head p { color: var(--muted); font-size: 16.5px; }
.section--ink .section-head p { color: #A8B0BA; }

/* ---------------------------------------------------------------- 顶部条 */
.topbar {
  background: var(--ink);
  color: #9AA3AD;
  font-size: 13px;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.topbar .container {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; height: 38px;
}
.topbar a:hover { color: #fff; }
.topbar__left { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__right { display: flex; align-items: center; gap: 16px; white-space: nowrap; }
.topbar__tel { color: var(--accent-2); font-weight: 700; font-size: 14px; letter-spacing: .02em; }

/* ---------------------------------------------------------------- 导航 */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s ease;
}
.header.is-stuck { box-shadow: var(--shadow-sm); }
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; height: var(--header-h);
}

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo__mark {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: var(--radius);
  background: linear-gradient(140deg, var(--accent) 0%, var(--accent-2) 100%);
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(255, 107, 0, .32);
}
.logo__mark svg { width: 26px; height: 26px; }
.logo__text { display: flex; flex-direction: column; line-height: 1.2; }
.logo__name { font-size: 22px; font-weight: 800; letter-spacing: .06em; color: var(--ink); }
.logo__sub { font-size: 11px; color: var(--muted-2); letter-spacing: .04em; margin-top: 2px; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  padding: 10px 15px;
  font-size: 15px; font-weight: 600;
  color: var(--text);
  border-radius: var(--radius);
  transition: color .2s ease, background .2s ease;
}
.nav a:hover { color: var(--accent); background: var(--sand); }
.nav a.is-active { color: var(--accent); }
.nav a.is-active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 3px;
  height: 2px; background: var(--accent); border-radius: 2px;
}

.header__cta {
  display: inline-flex; align-items: center; gap: 9px;
  height: 44px; padding: 0 20px;
  background: var(--accent); color: #fff;
  border-radius: var(--radius);
  font-weight: 700; font-size: 15px;
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(255, 107, 0, .3);
  transition: background .2s ease, transform .2s ease;
}
.header__cta:hover { background: var(--accent-dk); transform: translateY(-1px); }
.header__cta svg { width: 16px; height: 16px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--ink);
  transition: transform .25s ease, top .25s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.is-open span { background: transparent; }
.nav-toggle.is-open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-open span::after { top: 0; transform: rotate(-45deg); }

/* ---------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 52px; padding: 0 28px;
  border-radius: var(--radius);
  font-size: 16px; font-weight: 700;
  cursor: pointer; border: 1px solid transparent;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn svg { width: 18px; height: 18px; flex-shrink: 0; }
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(255, 107, 0, .28); }
.btn--primary:hover { background: var(--accent-dk); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .5); }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: var(--ink-3); }
.btn--line { background: #fff; color: var(--ink); border-color: var(--line); }
.btn--line:hover { border-color: var(--accent); color: var(--accent); }

/* ---------------------------------------------------------------- Hero */
.hero {
  position: relative;
  min-height: 620px;
  display: flex; align-items: center;
  background: var(--ink);
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  background-image: url("../img/hero-paving.jpg");
  background-size: cover;
  background-position: center 55%;
  transform: scale(1.04);
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(11, 14, 18, .95) 0%, rgba(11, 14, 18, .82) 42%, rgba(11, 14, 18, .42) 72%, rgba(11, 14, 18, .55) 100%),
    linear-gradient(to top, rgba(11, 14, 18, .85) 0%, transparent 38%);
}
.hero .container { position: relative; z-index: 2; padding-top: 84px; padding-bottom: 84px; }
.hero__inner { max-width: 640px; }
.hero h1 {
  font-size: clamp(32px, 5.2vw, 56px);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: #fff;
  margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent-2);
  position: relative;
}
.hero__lead {
  font-size: 17.5px;
  color: #C8CFD7;
  max-width: 560px;
  margin-bottom: 34px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 46px; }

.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero__tags span {
  padding: 7px 15px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 100px;
  font-size: 13.5px; color: #DCE2E8;
  background: rgba(255, 255, 255, .06);
  backdrop-filter: blur(4px);
}

/* 数据条 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat { background: #fff; padding: 28px 24px; }
.stat__num {
  font-size: 34px; font-weight: 800; line-height: 1;
  color: var(--accent);
  font-family: "DIN Alternate", "Barlow Condensed", var(--font);
  margin-bottom: 8px;
}
.stat__num small { font-size: 18px; font-weight: 700; margin-left: 2px; }
.stat__label { font-size: 14px; color: var(--muted); }

/* ---------------------------------------------------------------- 服务卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-card__media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--sand-2); }
.service-card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s cubic-bezier(.22,.61,.36,1);
}
.service-card:hover .service-card__media img { transform: scale(1.06); }
.service-card__badge {
  position: absolute; left: 14px; top: 14px;
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700; letter-spacing: .06em;
  padding: 5px 11px; border-radius: 100px;
}
.service-card__body { padding: 22px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.service-card__body h3 { font-size: 19px; margin-bottom: 10px; }
.service-card__body p { font-size: 14.5px; color: var(--muted); margin-bottom: 16px; }
.service-card__list { margin-top: auto; display: flex; flex-wrap: wrap; gap: 7px; }
.service-card__list span {
  font-size: 12.5px; color: var(--ink-3);
  background: var(--sand); border: 1px solid var(--line);
  padding: 4px 10px; border-radius: 3px;
}

/* ---------------------------------------------------------------- 流程 */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; position: relative; }
.process::before {
  content: ""; position: absolute; left: 12%; right: 12%; top: 26px;
  height: 2px; background: linear-gradient(90deg, var(--accent), rgba(255,163,0,.25));
  z-index: 0;
}
.step { position: relative; z-index: 1; padding: 0 18px; text-align: center; }
.step__no {
  width: 52px; height: 52px; margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--ink); color: var(--accent-2);
  display: grid; place-items: center;
  font-size: 19px; font-weight: 800;
  border: 4px solid var(--sand);
  box-shadow: 0 0 0 2px var(--accent);
}
.section--sand .step__no { border-color: var(--sand); }
.step h3 { font-size: 17.5px; margin-bottom: 9px; }
.step p { font-size: 14px; color: var(--muted); }

/* ---------------------------------------------------------------- 优势 */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why-item {
  padding: 30px 26px;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .04);
  transition: background .25s ease, transform .25s ease;
}
.why-item:hover { background: rgba(255, 255, 255, .08); transform: translateY(-4px); }
.why-item__icon {
  width: 46px; height: 46px; border-radius: var(--radius);
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; margin-bottom: 18px;
}
.why-item__icon svg { width: 24px; height: 24px; color: #fff; }
.why-item h3 { font-size: 17px; margin-bottom: 10px; color: #fff; }
.why-item p { font-size: 14px; color: #9BA4AF; }

/* ---------------------------------------------------------------- 案例 */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.filter-btn {
  padding: 9px 20px; border-radius: 100px;
  border: 1px solid var(--line); background: #fff;
  font-size: 14.5px; font-weight: 600; color: var(--muted);
  cursor: pointer; transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden; background: #fff;
  transition: transform .3s ease, box-shadow .3s ease;
}
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.case-card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.case-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover .case-card__media img { transform: scale(1.05); }
.case-card__tag {
  position: absolute; left: 0; top: 0;
  background: rgba(18, 21, 26, .82); color: #fff;
  font-size: 12.5px; font-weight: 600; padding: 6px 13px;
  border-bottom-right-radius: var(--radius);
}
.case-card__body { padding: 20px 22px 24px; }
.case-card__body h3 { font-size: 17px; margin-bottom: 9px; }
.case-card__body p { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.case-card__meta { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--muted-2); }
.case-card__meta span { display: inline-flex; align-items: center; gap: 5px; }
.case-card.is-hidden { display: none; }

/* ---------------------------------------------------------------- 设备 */
.equip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.equip-item {
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 24px 22px; background: #fff;
}
.equip-item h4 { font-size: 16.5px; margin-bottom: 8px; }
.equip-item p { font-size: 13.5px; color: var(--muted); }

/* ---------------------------------------------------------------- 服务区域 */
.area-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; align-items: start; }
.area-list { display: flex; flex-wrap: wrap; gap: 10px; }
.area-list span {
  padding: 9px 17px; border-radius: 100px;
  background: #fff; border: 1px solid var(--line);
  font-size: 14.5px; font-weight: 600; color: var(--ink-3);
  transition: all .2s ease;
}
.area-list span:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.area-note {
  padding: 26px 28px;
  background: var(--sand); border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.area-note h3 { font-size: 18px; margin-bottom: 12px; }
.area-note p { font-size: 15px; color: var(--muted); margin-bottom: 16px; }
.area-note strong { color: var(--accent); }

/* ---------------------------------------------------------------- CTA */
.cta-band {
  position: relative;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: url("../img/case-road.jpg");
  background-size: cover; background-position: center 60%;
  opacity: .22;
}
.cta-band::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(18,21,26,.96) 0%, rgba(18,21,26,.82) 55%, rgba(18,21,26,.6) 100%);
}
.cta-band .container { position: relative; z-index: 2; padding-top: 72px; padding-bottom: 72px; }
.cta-band__inner { max-width: 700px; }
.cta-band h2 { font-size: clamp(25px, 3.4vw, 36px); margin-bottom: 16px; }
.cta-band p { color: #B4BCC6; font-size: 16.5px; margin-bottom: 30px; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.cta-band__tel {
  display: inline-flex; align-items: baseline; gap: 8px;
  font-size: 15px; color: #98A1AC;
}
.cta-band__tel b { font-size: 26px; color: var(--accent-2); font-weight: 800; letter-spacing: .02em; }

/* ---------------------------------------------------------------- 表单 */
.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--ink-2); }
.field label i { color: var(--accent); font-style: normal; }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: var(--radius);
  font-family: inherit; font-size: 15px; color: var(--text);
  background: #fff; transition: border-color .2s ease, box-shadow .2s ease;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 107, 0, .12);
}
.field input::placeholder, .field textarea::placeholder { color: #A8B0BA; }
.form-note { font-size: 13px; color: var(--muted-2); margin-top: 12px; }
.form-alert {
  display: none; align-items: center; gap: 8px;
  background: #FFF4E8; border: 1px solid #FFD9AE; color: #9A4B00;
  padding: 12px 16px; border-radius: var(--radius);
  font-size: 14.5px; margin-bottom: 18px;
}
.form-alert.is-show { display: flex; }

/* ---------------------------------------------------------------- 联系信息 */
.info-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.info-card {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 24px; border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: #fff;
}
.info-card__icon {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: var(--radius); background: var(--sand);
  display: grid; place-items: center; color: var(--accent);
}
.info-card__icon svg { width: 22px; height: 22px; }
.info-card h4 { font-size: 15px; color: var(--muted); font-weight: 600; margin-bottom: 5px; }
.info-card p, .info-card a { font-size: 17px; font-weight: 700; color: var(--ink); }
.info-card a:hover { color: var(--accent); }

/* ---------------------------------------------------------------- 页头横幅 */
.page-hero {
  position: relative;
  padding: 76px 0 68px;
  background: var(--ink);
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: url("../img/case-sidewalk.jpg");
  background-size: cover; background-position: center 60%;
  opacity: .3;
}
.page-hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(18,21,26,.94) 30%, rgba(18,21,26,.65));
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(28px, 4.4vw, 44px); margin-bottom: 14px; }
.page-hero p { color: #B4BCC6; max-width: 680px; font-size: 16.5px; }
.crumb { font-size: 13.5px; color: #8A939E; margin-bottom: 16px; }
.crumb a:hover { color: var(--accent-2); }
.crumb span { margin: 0 8px; color: #5C646E; }

/* ---------------------------------------------------------------- 内容排版 */
.content-split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.content-split--reverse .content-split__media { order: -1; }
.content-split__media { position: relative; border-radius: var(--radius-lg); overflow: hidden; }
.content-split__media img { width: 100%; display: block; }
.content-split__badge {
  position: absolute; left: 0; bottom: 0;
  background: var(--accent); color: #fff;
  padding: 16px 24px;
}
.content-split__badge b { display: block; font-size: 26px; line-height: 1.1; }
.content-split__badge span { font-size: 12.5px; opacity: .9; }
.prose p { color: var(--muted); margin-bottom: 16px; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--text); }
.prose ul { margin: 20px 0 0; display: grid; gap: 11px; }
.prose ul li { position: relative; padding-left: 26px; color: var(--muted); font-size: 15.5px; }
.prose ul li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 12px; height: 12px; border-radius: 3px;
  background: var(--accent);
  box-shadow: inset 0 0 0 2px #fff;
}
.prose h3 { font-size: 21px; margin: 34px 0 14px; }
.prose h3:first-child { margin-top: 0; }

/* 时间线 */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 9px; top: 8px; bottom: 8px;
  width: 2px; background: var(--line);
}
.timeline li { position: relative; padding-bottom: 30px; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px #fff;
}
.timeline h4 { font-size: 17px; margin-bottom: 7px; }
.timeline p { font-size: 14.5px; color: var(--muted); }

/* 通用表格 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.spec-table th, .spec-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line); }
.spec-table th { background: var(--ink); color: #fff; font-weight: 700; font-size: 14.5px; }
.spec-table td:first-child { font-weight: 700; color: var(--ink); width: 32%; }
.spec-table tbody tr:nth-child(even) { background: var(--sand); }

/* ---------------------------------------------------------------- 页脚 */
.footer { background: var(--ink); color: #9BA4AF; padding: 64px 0 0; }
.footer__grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
  gap: 40px; padding-bottom: 44px;
}
.footer .logo__name { color: #fff; }
.footer .logo__sub { color: #7C858F; }
.footer__about { font-size: 14px; line-height: 1.9; margin-top: 18px; max-width: 320px; }
.footer h5 { color: #fff; font-size: 15.5px; margin-bottom: 18px; font-weight: 700; }
.footer__links li { margin-bottom: 11px; font-size: 14px; }
.footer__links a:hover { color: var(--accent-2); }
.footer__contact li {
  display: flex; gap: 10px; margin-bottom: 14px; font-size: 14px; line-height: 1.7;
}
.footer__contact svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 4px; color: var(--accent); }
.footer__contact a:hover { color: #fff; }
.footer__tel { font-size: 24px; font-weight: 800; color: var(--accent-2); display: block; margin-bottom: 4px; letter-spacing: .01em; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .09);
  padding: 20px 0;
  display: flex; flex-wrap: wrap; gap: 12px;
  justify-content: space-between; align-items: center;
  font-size: 13px; color: #6E767F;
}
.footer__bottom a:hover { color: var(--accent-2); }
.footer__seo { font-size: 12.5px; color: #5C646E; padding-bottom: 26px; line-height: 1.9; }

/* ---------------------------------------------------------------- 返回顶部 */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: var(--radius);
  background: var(--ink); color: #fff; border: none;
  display: grid; place-items: center; cursor: pointer;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .28s ease;
  box-shadow: var(--shadow-md);
}
.back-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--accent); }
.back-top svg { width: 20px; height: 20px; }

/* ---------------------------------------------------------------- 动效 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }
.reveal[data-delay="5"] { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1080px) {
  .services-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr !important; gap: 36px !important; }
  .why-grid, .equip-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); gap: 36px 0; }
  .process::before { display: none; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .content-split { gap: 36px; }
}

@media (max-width: 900px) {
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 12px 24px 22px; gap: 2px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-130%); opacity: 0; pointer-events: none;
    transition: transform .32s cubic-bezier(.22,.61,.36,1), opacity .25s ease;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: 13px 4px; border-bottom: 1px solid var(--sand); border-radius: 0; }
  .nav a.is-active::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .header__cta { display: none; }
  .topbar .topbar__hide-sm { display: none; }
  .section { padding: 64px 0; }
  .content-split { grid-template-columns: 1fr; }
  .content-split--reverse .content-split__media { order: 0; }
  .area-grid { grid-template-columns: 1fr; gap: 28px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .services-grid, .case-grid, .why-grid, .equip-grid,
  .info-grid, .form-row { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 30px; }
  .hero { min-height: 0; }
  .hero .container { padding-top: 62px; padding-bottom: 62px; }
  .hero__actions .btn { width: 100%; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 20px 16px; }
  .stat__num { font-size: 27px; }
  .section-head { margin-bottom: 36px; }
  .form-card { padding: 22px 18px; }
  .container { padding: 0 18px; }
  .topbar .container { height: auto; padding-top: 7px; padding-bottom: 7px; gap: 10px; }
  .topbar__left { gap: 12px; font-size: 12px; flex: 1 1 auto; min-width: 0; }
  .topbar__left .topbar__item { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .topbar__right { flex: 0 0 auto; gap: 10px; }
  .topbar__tel { font-size: 12.5px; }
  .logo__name { font-size: 20px; }
  .logo__sub { font-size: 10px; }
}