/* ==========================================================================
   杭州南方自动化工程有限公司 — SOUTHERN AUTOMATION
   主样式表 v1.0 简单版
   ========================================================================== */

/* ---------- 1. 设计令牌 ----------
   品牌色取自 Logo 原图精确采样：主体蓝 #0084AC，文字暗部 #332C2B
------------------------------------------------------- */
:root {
  /* 主色：Logo 蓝块真值 */
  --c-primary: #0084ac;
  --c-primary-light: #17a2d4;
  --c-primary-dark: #00607f;
  --c-primary-soft: #e2f1f7;
  /* 强调色：Logo 黄色折角 */
  --c-accent: #f5c400;
  --c-accent-dark: #d9a800;

  /* 中性色：暗部取 Logo 文字色 #332C2B（非纯黑，更柔和） */
  --c-ink: #2a2625;
  --c-ink-deep: #1a1716;
  --c-body: #4a555e;
  --c-muted: #8593a0;
  --c-line: #e3eaef;
  --c-bg: #ffffff;
  --c-bg-soft: #f4f8fa;

  /* 字体 */
  --f-sans: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
  --f-num: "Bahnschrift", "DIN Alternate", "Arial Narrow", sans-serif;

  /* 尺寸 */
  --w-max: 1280px;
  --sec-pad: 88px;
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;

  --shadow-sm: 0 2px 10px rgba(42, 38, 37, .06);
  --shadow-md: 0 10px 34px rgba(42, 38, 37, .10);
  --shadow-lg: 0 22px 60px rgba(42, 38, 37, .16);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-body);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
}

p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; transition: color .25s; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

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

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

/* ---------- 3. 通用组件 ---------- */
.sec { padding: var(--sec-pad) 0; }
.sec--soft { background: var(--c-bg-soft); }
/* 浅色分区（替代原深色 .sec--ink） */
.sec--tint {
  background: linear-gradient(180deg, var(--c-primary-soft) 0%, #eef6fa 100%);
  color: var(--c-body);
}

/* 章节标题 */
.sec-head { margin-bottom: 52px; }

.sec-head__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--f-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-primary);
  margin-bottom: 14px;
}
.sec-head__tag::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--c-accent);
}
.sec-head__tag em {
  font-style: normal;
  color: var(--c-primary);
}

.sec-head__title {
  font-size: clamp(26px, 3.2vw, 40px);
  letter-spacing: -.02em;
}
.sec-head__sub {
  margin: 14px 0 0;
  max-width: 640px;
  font-size: 16px;
}
.sec-head--center { text-align: center; }
.sec-head--center .sec-head__sub { margin-left: auto; margin-right: auto; }
.sec-head--center .sec-head__tag::after {
  content: "";
  width: 26px; height: 2px;
  background: var(--c-accent);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: var(--r-sm);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: all .28s cubic-bezier(.4, 0, .2, 1);
}
.btn svg { transition: transform .28s; }
.btn:hover svg { transform: translateX(4px); }

.btn--solid {
  background: var(--c-primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 132, 172, .3);
}
.btn--solid:hover {
  background: var(--c-primary-dark);
  box-shadow: 0 10px 28px rgba(0, 132, 172, .42);
}

.btn--ghost {
  border: 1.5px solid var(--c-line);
  color: var(--c-ink);
  background: #fff;
}
.btn--ghost:hover {
  background: var(--c-primary-soft);
  border-color: var(--c-primary-light);
  color: var(--c-primary-dark);
}

.btn--line {
  border: 1.5px solid var(--c-line);
  color: var(--c-ink);
}
.btn--line:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

/* 数据格 */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #dbe8ef;
  border: 1px solid #dbe8ef;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.stat {
  padding: 34px 20px;
  text-align: center;
  background: #fff;
}
.stat__num {
  font-family: var(--f-num);
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-primary);
  letter-spacing: -.02em;
}
.stat__num em {
  font-style: normal;
  font-size: .46em;
  color: var(--c-accent-dark);
  margin-left: 2px;
}
.stat__label {
  margin-top: 12px;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--c-muted);
}

/* ---------- 4. 顶部导航（白底） ---------- */
.hdr {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .3s;
}
.hdr.is-stuck {
  box-shadow: 0 4px 22px rgba(42, 38, 37, .10);
}

.hdr__bar {
  display: flex;
  align-items: center;
  gap: 40px;
  height: 76px;
}

.hdr__logo img {
  height: 34px;
  width: auto;
}

.hdr__nav {
  display: flex;
  gap: 34px;
  margin-left: auto;
}
.hdr__nav a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink);
  padding: 6px 0;
}
.hdr__nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--c-primary);
  transition: width .3s;
}
.hdr__nav a:hover { color: var(--c-primary); }
.hdr__nav a:hover::after { width: 100%; }

.hdr__tel {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-left: 30px;
  border-left: 1px solid var(--c-line);
}
.hdr__tel b {
  font-family: var(--f-num);
  font-size: 20px;
  color: var(--c-primary);
  letter-spacing: .02em;
}
.hdr__tel small {
  display: block;
  font-size: 11px;
  color: var(--c-muted);
  line-height: 1;
  letter-spacing: .1em;
}

.hdr__burger { display: none; margin-left: auto; }

/* ---------- 5. 首屏（浅色） ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 90px;
  background: linear-gradient(170deg, #ffffff 0%, var(--c-primary-soft) 58%, #dceef6 100%);
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; }
.hero__bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .16;
  filter: saturate(.85);
}
.hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(255, 255, 255, .92) 0%, rgba(255, 255, 255, .7) 48%, rgba(255, 255, 255, .3) 100%),
    repeating-linear-gradient(90deg, rgba(0, 132, 172, .05) 0 1px, transparent 1px 88px);
}

/* 网格底纹 */
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 132, 172, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 132, 172, .10) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 76% 62% at 50% 42%, #000 35%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 76% 62% at 50% 42%, #000 35%, transparent 100%);
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  border: 1px solid rgba(0, 132, 172, .3);
  border-radius: 100px;
  background: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--c-primary-dark);
  margin-bottom: 26px;
  box-shadow: var(--shadow-sm);
}
.hero__badge i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent-dark);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(245, 196, 0, .6); }
  50% { opacity: .6; box-shadow: 0 0 0 8px rgba(245, 196, 0, 0); }
}

.hero__title {
  font-size: clamp(38px, 6.2vw, 74px);
  line-height: 1.14;
  letter-spacing: -.03em;
  color: var(--c-ink);
}
.hero__title em {
  font-style: normal;
  color: transparent;
  background: linear-gradient(96deg, var(--c-primary), var(--c-primary-light));
  -webkit-background-clip: text;
  background-clip: text;
}
.hero__title b {
  color: var(--c-accent-dark);
  font-weight: 700;
}

.hero__desc {
  margin: 26px 0 40px;
  max-width: 570px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--c-body);
}

.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }

.hero__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 68px;
  padding-top: 34px;
  border-top: 1px solid var(--c-line);
}
.hero__feat {
  display: flex;
  align-items: flex-start;
  gap: 13px;
}
.hero__feat svg { flex: none; margin-top: 3px; }
.hero__feat b {
  display: block;
  font-size: 15px;
  color: var(--c-ink);
  margin-bottom: 3px;
}
.hero__feat span { font-size: 13px; color: var(--c-muted); line-height: 1.6; }

/* 滚动指示 */
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 28px;
  z-index: 2;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--f-num);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--c-muted);
}
.hero__scroll i {
  width: 1px; height: 38px;
  background: linear-gradient(to bottom, rgba(0, 132, 172, .5), transparent);
  animation: drop 2.2s infinite;
}
@keyframes drop {
  0% { transform: scaleY(.2); transform-origin: top; opacity: 0; }
  40% { opacity: 1; }
  100% { transform: scaleY(1); transform-origin: top; opacity: 0; }
}

/* ---------- 6. 业务板块 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.biz-card {
  position: relative;
  padding: 40px 30px 36px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .4s cubic-bezier(.4, 0, .2, 1), box-shadow .4s, border-color .4s;
}
.biz-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s;
}
.biz-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.biz-card:hover::before { transform: scaleX(1); }

.biz-card__no {
  font-family: var(--f-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--c-primary-light);
}
.biz-card__icon {
  width: 54px; height: 54px;
  display: grid;
  place-items: center;
  margin: 16px 0 22px;
  border-radius: var(--r-md);
  background: linear-gradient(140deg, #e2f1f7, #f4f8fa);
  color: var(--c-primary);
  transition: background .4s, color .4s;
}
.biz-card:hover .biz-card__icon {
  background: linear-gradient(140deg, var(--c-primary), var(--c-primary-light));
  color: #fff;
}
.biz-card h3 { font-size: 21px; margin-bottom: 12px; }
.biz-card p { font-size: 15px; margin-bottom: 22px; }

.biz-card__list { display: grid; gap: 9px; }
.biz-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--c-body);
}
.biz-card__list li::before {
  content: "";
  position: absolute;
  left: 0; top: .72em;
  width: 6px; height: 6px;
  border: 1.5px solid var(--c-primary-light);
  border-radius: 50%;
}

/* ---------- 7. 关于我们 ---------- */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.about__media { position: relative; }
.about__media img {
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  width: 100%;
  object-fit: cover;
}
.about__badge {
  position: absolute;
  right: -28px;
  bottom: -28px;
  padding: 26px 30px;
  background: var(--c-primary);
  border-radius: var(--r-md);
  color: #fff;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.about__badge b {
  display: block;
  font-family: var(--f-num);
  font-size: 42px;
  line-height: 1;
}
.about__badge span { font-size: 13px; opacity: .82; letter-spacing: .06em; }

.about__body p { font-size: 16px; margin-bottom: 1.1em; }
.about__body p::first-letter { font-size: 1.05em; }

.about__quote {
  margin: 26px 0 30px;
  padding: 20px 24px;
  border-left: 3px solid var(--c-accent);
  background: var(--c-bg-soft);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 15px;
  color: var(--c-ink);
  font-weight: 500;
}

.about__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.about__pillar {
  padding: 18px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  text-align: center;
  transition: border-color .3s, background .3s;
}
.about__pillar:hover { border-color: var(--c-primary-light); background: var(--c-bg-soft); }
.about__pillar b {
  display: block;
  font-size: 16px;
  color: var(--c-ink);
  margin-bottom: 4px;
}
.about__pillar span { font-size: 13px; color: var(--c-muted); }

/* 时间轴 */
.timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  margin-top: 12px;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 7px;
  height: 1px;
  background: var(--c-line);
}
.tl-item { position: relative; padding: 34px 20px 0 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 15px; height: 15px;
  border-radius: 50%;
  border: 2px solid var(--c-primary);
  background: #fff;
  transition: background .3s, box-shadow .3s;
}
.tl-item:hover::before {
  background: var(--c-accent);
  border-color: var(--c-accent-dark);
  box-shadow: 0 0 0 6px rgba(245, 196, 0, .22);
}
.tl-item__year {
  font-family: var(--f-num);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: -.01em;
}
.tl-item__text {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-body);
}

/* ---------- 8. 产品中心 ---------- */
.prod-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.prod-tab {
  padding: 11px 26px;
  border: 1px solid var(--c-line);
  border-radius: 100px;
  background: #fff;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-body);
  transition: all .3s;
}
.prod-tab:hover { border-color: var(--c-primary-light); color: var(--c-primary); }
.prod-tab.is-on {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(0, 132, 172, .26);
}

.prod-group { display: none; }
.prod-group.is-on { display: block; animation: fadeUp .5s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}

.prod-group__head {
  display: flex;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}
.prod-group__head h3 { font-size: 22px; }
.prod-group__head span { font-size: 14px; color: var(--c-muted); padding-bottom: 3px; }

.prod-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.prod-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: #fff;
  transition: transform .35s, box-shadow .35s, border-color .35s;
}
.prod-card:hover {
  transform: translateY(-5px);
  border-color: var(--c-primary-light);
  box-shadow: var(--shadow-md);
}
.prod-card__no {
  font-family: var(--f-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--c-primary-light);
}
.prod-card h4 {
  margin: 8px 0 8px;
  font-size: 17px;
  font-family: var(--f-num);
  letter-spacing: .01em;
}
.prod-card p { font-size: 13.5px; line-height: 1.7; margin: 0; color: var(--c-muted); }
.prod-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
}
.prod-card__tags span {
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--c-bg-soft);
  font-size: 12px;
  color: var(--c-primary-dark);
}

/* 产品精选图 */
.prod-feature {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 46px;
}
.prod-feature__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: #eef4f7;
  border: 1px solid var(--c-line);
}
.prod-feature__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 8;
  transition: transform .7s cubic-bezier(.4, 0, .2, 1);
}
.prod-feature__item:hover img { transform: scale(1.05); }
.prod-feature__cap {
  position: absolute;
  inset: auto 0 0;
  padding: 22px 24px;
  background: linear-gradient(transparent, rgba(42, 38, 37, .88));
  color: #fff;
}
.prod-feature__cap b { display: block; font-size: 17px; margin-bottom: 3px; }
.prod-feature__cap span { font-size: 13px; opacity: .78; }

/* ---------- 9. 应用领域 ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: #dbe8ef;
  border: 1px solid #dbe8ef;
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.app-item {
  padding: 38px 26px;
  background: #fff;
  transition: background .35s;
}
.app-item:hover { background: var(--c-primary-soft); }
.app-item svg { color: var(--c-primary); margin-bottom: 18px; }
.app-item b {
  display: block;
  font-size: 17px;
  color: var(--c-ink);
  margin-bottom: 8px;
}
.app-item span { font-size: 13.5px; line-height: 1.7; color: var(--c-body); }

/* ---------- 10. 服务优势 ---------- */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.adv-item { position: relative; padding-top: 26px; border-top: 2px solid var(--c-primary); }
.adv-item__no {
  font-family: var(--f-num);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: rgba(0, 132, 172, .16);
  margin-bottom: 12px;
}
.adv-item h3 { font-size: 18px; margin-bottom: 10px; }
.adv-item p { font-size: 14.5px; margin: 0; }

/* ---------- 11. 新闻 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform .35s, box-shadow .35s;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-card__date {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 22px;
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-line);
  font-family: var(--f-num);
}
.news-card__date b { font-size: 24px; color: var(--c-primary); }
.news-card__date span { font-size: 13px; color: var(--c-muted); }
.news-card__body { padding: 20px 22px 24px; flex: 1; }
.news-card__body h3 { font-size: 17px; margin-bottom: 10px; }
.news-card__body p { font-size: 14px; color: var(--c-muted); margin: 0; }

/* ---------- 12. 联系 ---------- */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.contact__info {
  padding: 52px 46px;
  background: linear-gradient(165deg, var(--c-primary) 0%, var(--c-primary-dark) 100%);
  color: rgba(255, 255, 255, .88);
}
.contact__info h2 { color: #fff; font-size: 27px; margin-bottom: 14px; }
.contact__info > p { font-size: 14.5px; margin-bottom: 30px; }

.contact__row {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-top: 1px solid rgba(255, 255, 255, .2);
}
.contact__row svg { flex: none; margin-top: 4px; color: #fff; }
.contact__row b {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, .7);
  letter-spacing: .05em;
  margin-bottom: 3px;
}
.contact__row span { font-size: 15.5px; color: #fff; }
.contact__row .tel {
  font-family: var(--f-num);
  font-size: 25px;
  letter-spacing: .01em;
}

.contact__form { padding: 52px 46px; background: #fff; }
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.field { display: flex; flex-direction: column; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink);
  margin-bottom: 7px;
}
.field label i { color: #e04a4a; font-style: normal; }
.field input,
.field select,
.field textarea {
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  font-family: inherit;
  font-size: 14.5px;
  color: var(--c-ink);
  background: var(--c-bg-soft);
  transition: border-color .25s, background .25s;
  outline: none;
}
.field textarea { resize: vertical; min-height: 104px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--c-primary-light);
  background: #fff;
}
.field input::placeholder,
.field textarea::placeholder { color: #a9b7c1; }

.contact__form .btn { width: 100%; justify-content: center; margin-top: 22px; }
.form-note {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--c-muted);
  text-align: center;
}

/* ---------- 13. 页脚 ---------- */
.ftr {
  padding: 62px 0 26px;
  background: var(--c-bg-soft);
  color: var(--c-body);
  font-size: 14px;
  border-top: 1px solid var(--c-line);
}
.ftr__top {
  display: grid;
  grid-template-columns: 1.3fr .8fr 1.1fr;
  gap: 44px;
  padding-bottom: 38px;
  border-bottom: 1px solid var(--c-line);
}
.ftr__brand img {
  height: 36px;
  width: auto;
  margin-bottom: 18px;
}
.ftr__brand p { max-width: 340px; line-height: 1.85; margin: 0; color: var(--c-muted); }

.ftr h4 {
  font-size: 15px;
  color: var(--c-ink);
  margin-bottom: 16px;
}
.ftr__links { display: grid; gap: 10px; }
.ftr__links a { color: var(--c-body); font-size: 14px; }
.ftr__links a:hover { color: var(--c-primary); }
.ftr__contact { display: grid; gap: 10px; font-size: 14px; line-height: 1.7; }

.ftr__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  justify-content: space-between;
  padding-top: 22px;
  font-size: 13px;
  color: var(--c-muted);
}
.ftr__bottom span:first-child { white-space: nowrap; }
.ftr__bottom span:last-child {
  flex: 1 1 420px;
  text-align: right;
  line-height: 1.7;
}

/* 商标声明提示条 */
.trademark-note {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: -28px 0 34px;
  padding: 13px 18px;
  background: var(--c-primary-soft);
  border: 1px solid rgba(0, 132, 172, .2);
  border-radius: var(--r-md);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-primary-dark);
}
.trademark-note svg { flex: none; margin-top: 3px; }

/* ---------- 14. 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s cubic-bezier(.4, 0, .2, 1), transform .7s cubic-bezier(.4, 0, .2, 1);
}
.reveal.is-in { opacity: 1; transform: none; }

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

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1080px) {
  :root { --sec-pad: 68px; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid,
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .hdr__tel { display: none; }
}

@media (max-width: 860px) {
  :root { --sec-pad: 56px; }

  .hdr__bar { height: 66px; }
  .hdr__burger {
    display: block;
    width: 42px; height: 42px;
    position: relative;
    z-index: 2;
  }
  .hdr__burger span {
    position: absolute;
    left: 9px;
    width: 24px; height: 2px;
    background: var(--c-ink);
    border-radius: 2px;
    transition: transform .3s, opacity .25s, background .25s;
  }
  .hdr__burger span:nth-child(1) { top: 15px; }
  .hdr__burger span:nth-child(2) { top: 20px; }
  .hdr__burger span:nth-child(3) { top: 25px; }
  .hdr.is-open .hdr__burger span { background: var(--c-primary); }
  .hdr.is-open .hdr__burger span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
  .hdr.is-open .hdr__burger span:nth-child(2) { opacity: 0; }
  .hdr.is-open .hdr__burger span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

  .hdr__nav {
    position: fixed;
    inset: 66px 0 auto;
    flex-direction: column;
    gap: 0;
    padding: 10px 24px 24px;
    background: #fff;
    box-shadow: 0 12px 28px rgba(42, 38, 37, .12);
    transform: translateY(-120%);
    transition: transform .38s cubic-bezier(.4, 0, .2, 1);
    max-height: calc(100vh - 66px);
    overflow-y: auto;
  }
  .hdr.is-open .hdr__nav { transform: none; }
  .hdr__nav a { padding: 14px 0; border-bottom: 1px solid var(--c-line); font-size: 16px; }

  .hero { padding: 116px 0 72px; min-height: auto; }
  .hero__features { grid-template-columns: 1fr; gap: 16px; margin-top: 48px; }
  .hero__scroll { display: none; }

  .stat-row { grid-template-columns: repeat(2, 1fr); }

  .about { grid-template-columns: 1fr; gap: 44px; }
  .about__badge { right: 16px; bottom: -20px; padding: 18px 22px; }
  .about__badge b { font-size: 32px; }
  .about__pillars { grid-template-columns: 1fr; gap: 10px; }
  .about__pillar { display: flex; align-items: baseline; gap: 10px; text-align: left; }
  .about__pillar b { margin: 0; }

  .timeline { grid-template-columns: 1fr; gap: 0; }
  .timeline::before { left: 7px; top: 0; bottom: 0; right: auto; width: 1px; height: auto; }
  .tl-item { padding: 0 0 30px 34px; }
  .tl-item::before { top: 5px; }
  .tl-item:last-child { padding-bottom: 0; }

  .prod-feature { grid-template-columns: 1fr; gap: 16px; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .trademark-note { margin: -20px 0 28px; }
  .ftr__bottom span:last-child { text-align: left; }

  .adv-grid,
  .app-grid { grid-template-columns: 1fr; }

  .news-grid { grid-template-columns: 1fr; }

  .contact { grid-template-columns: 1fr; }
  .contact__info,
  .contact__form { padding: 38px 28px; }

  .ftr__top { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 520px) {
  .wrap { padding: 0 18px; }
  .biz-grid { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { justify-content: center; }
}