/* ============================================================
   美康达精密制造（佛山）有限公司 - 全站样式
   设计基调：高级精密工业质感
   主色：深灰 #16191d / #1d2126   金属银：#b9c2cc / #dfe4e9
   点缀：黄铜金 #b88a3a（克制使用，仅按钮/强调，契合金属加工语义）
   原则：干净专业的B端风格，无花哨动画，面向工厂采购/工程师
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --c-bg:        #f4f5f7;   /* 页面浅灰底（正文区） */
  --c-bg-deep:   #1a1e23;   /* 深灰底（首屏/页脚/深色区） */
  --c-panel:     #ffffff;   /* 卡片白 */
  --c-ink:       #23272d;   /* 主文字 */
  --c-ink-2:     #5a626d;   /* 次级文字 */
  --c-silver:    #8b95a1;   /* 金属银（辅助） */
  --c-silver-l:  #d7dce2;   /* 浅银（分隔线） */
  --c-steel:     #b88a3a;   /* 黄铜金（按钮/强调） */
  --c-steel-dk:  #8f6a28;
  --c-line:      #e2e6ea;
  --c-ok:        #2f7d4f;
  --c-err:       #b03a3a;
  --shadow:      0 1px 3px rgba(20, 24, 29, .08), 0 8px 24px rgba(20, 24, 29, .06);
  --radius:      6px;
  --container:   1180px;
  --header-h:    72px;
  --font: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  font-size: 16px;
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { color: var(--c-steel); text-decoration: none; }
a:hover { color: var(--c-steel-dk); }
ul, ol { list-style: none; }
h1, h2, h3 { font-weight: 700; line-height: 1.35; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 8px; top: 8px; z-index: 999; background: #fff; padding: 8px 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 10px 26px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; border: 1px solid transparent;
  cursor: pointer; transition: background .15s, color .15s, border-color .15s;
  text-align: center;
}
.btn--accent { background: var(--c-steel); color: #fff; }
.btn--accent:hover { background: var(--c-steel-dk); color: #fff; }
.btn--ghost { background: transparent; color: inherit; border-color: currentColor; }
.btn--ghost:hover { border-color: var(--c-steel); color: var(--c-steel); }
.btn--lg { padding: 13px 34px; font-size: 16px; }

/* ---------- 顶部固定导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(26, 30, 35, .96);
  border-bottom: 1px solid rgba(185, 194, 204, .18);
  backdrop-filter: blur(6px);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand__mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border: 1px solid var(--c-silver);
  color: var(--c-silver-l); font-weight: 700; letter-spacing: 1px;
  border-radius: 3px; font-size: 14px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.3; }
.brand__name { color: #eef1f4; font-size: 17px; }
.brand__sub { color: var(--c-silver); font-size: 12px; }
.brand__img {
  display: block;
  max-width: 180px;
  width: auto;
  height: 42px;
  object-fit: contain;
}
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav ul { display: flex; gap: 4px; }
.main-nav ul a {
  display: block; padding: 8px 14px; color: #c4cbd3; font-size: 15px;
  border-radius: 4px;
}
.main-nav ul a:hover { color: #fff; }
.main-nav ul li.is-active a { color: #fff; font-weight: 600; position: relative; }
.main-nav ul li.is-active a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--c-silver-l);
}
.main-nav__cta { flex-shrink: 0; }
.nav-toggle { display: none; }

/* ---------- 移动端底部快捷条（PC隐藏） ---------- */
.mobile-bar { display: none; }

/* ---------- 首屏 Hero ---------- */
main, .page-hero, .hero { margin-top: 0; }
body { padding-top: var(--header-h); }
.hero {
  position: relative; min-height: 620px; display: flex; align-items: center;
  background: var(--c-bg-deep); color: #fff; overflow: hidden;
}
.hero__media, .hero__media .hero__img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__media .hero__img { object-fit: cover; }
.hero__media .img-placeholder { height: 100%; border: none; background: linear-gradient(135deg, #23282f 0%, #2d333c 100%); }
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(20, 23, 27, .92) 0%, rgba(20, 23, 27, .72) 45%, rgba(20, 23, 27, .35) 100%);
}
.hero__content { position: relative; z-index: 2; max-width: var(--container); display: flex; align-items: center; justify-content: space-between; gap: 60px; }
.hero__body { flex: 1 1 620px; max-width: 680px; }
.hero__tag { color: var(--c-silver); font-size: 14px; letter-spacing: 2px; margin-bottom: 14px; }
.hero__title { font-size: 42px; color: #f2f4f6; margin-bottom: 18px; }
.hero__desc { color: #c3cad2; max-width: 640px; margin-bottom: 20px; }
.hero__points { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-bottom: 32px; }
.hero__points li { color: #aeb7c0; font-size: 14px; padding-left: 18px; position: relative; }
.hero__points li::before { content: ""; position: absolute; left: 0; top: 11px; width: 8px; height: 8px;
  border: 1px solid var(--c-steel); background: linear-gradient(135deg, #d4a84d, #b88a3a); }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__actions .btn--ghost { color: #dfe4e9; }

/* 首屏右侧数字卡片 */
.hero__stats { flex: 0 0 220px; display: flex; flex-direction: column; gap: 18px; }
.hero-stat {
  background: rgba(26, 30, 35, .72); border: 1px solid rgba(184, 138, 58, .35);
  border-radius: var(--radius); padding: 22px 18px; text-align: center;
  backdrop-filter: blur(4px);
}
.hero-stat__num { display: block; font-size: 28px; font-weight: 700; color: #f2f4f6; letter-spacing: .5px; margin-bottom: 4px; }
.hero-stat__txt { display: block; font-size: 13px; color: #aeb7c0; }

/* ---------- 首页信任信号条 ---------- */
.cert-strip { background: #111417; border-bottom: 1px solid rgba(184, 138, 58, .18); color: #b9c2cc; }
.cert-strip__inner { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 14px 28px; padding: 16px 24px; font-size: 13.5px; }
.cert-strip__item { display: flex; align-items: center; gap: 10px; }
.cert-strip__item--title strong { color: #f2f4f6; font-weight: 600; }
.cert-strip__item--title span[aria-hidden] { color: var(--c-steel); font-size: 16px; }
.cert-strip__divider { width: 1px; height: 18px; background: rgba(184, 138, 58, .25); }
.cert-strip__arrow { color: var(--c-steel); font-weight: 700; }

/* ---------- 内页页头 ---------- */
.page-hero {
  background: linear-gradient(135deg, #20252b 0%, #2a3038 100%);
  color: #eef1f4; padding: 64px 0 56px; border-bottom: 3px solid var(--c-steel);
}
.page-hero__crumb { font-size: 13px; color: var(--c-silver); margin-bottom: 10px; }
.page-hero__crumb a { color: var(--c-silver); }
.page-hero h1 { font-size: 32px; }

/* ---------- 通用版块 ---------- */
.section { padding: 72px 0; }
.section--alt { background: #ebedef; }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-head h2 { font-size: 28px; margin-bottom: 12px; position: relative; padding-left: 18px; }
.section-head h2::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 4px;
  background: linear-gradient(180deg, #d4a84d, #b88a3a); border-radius: 2px;
}
.section-head p { color: var(--c-ink-2); }
.section-more { text-align: center; margin-top: 36px; }

/* ---------- 网格与卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--c-panel); border-radius: var(--radius); padding: 28px 26px;
  box-shadow: var(--shadow); border-top: 2px solid var(--c-silver-l);
}
.card__no { font-size: 13px; color: var(--c-silver); font-weight: 700; letter-spacing: 2px; margin-bottom: 10px; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--c-ink-2); font-size: 14.5px; }
.card--h { border-top: none; border-left: 3px solid var(--c-silver); }

/* ---------- 图片与占位 ---------- */
.photo { margin: 0; }
.photo__img { width: 100%; height: 260px; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.photo--wide .photo__img { height: 420px; }
.photo figcaption { font-size: 13px; color: var(--c-ink-2); margin-top: 8px; text-align: center; }

.img-placeholder {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px; background: #262b31; color: #9aa4af;
  border: 1px dashed #4a525c; border-radius: var(--radius);
  min-height: 200px; height: 100%; padding: 20px; text-align: center;
}
.img-placeholder__icon { font-size: 26px; opacity: .7; }
.img-placeholder__label { font-size: 15px; font-weight: 600; color: #c6cdd4; }
.img-placeholder__desc { font-size: 12.5px; color: #7d8791; max-width: 320px; }
.img-placeholder__key { font-size: 11px; color: #5d6670; font-family: Consolas, monospace; }

/* ---------- 左右分栏 ---------- */
.split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 44px; align-items: center; }
.split__text h2 { font-size: 26px; margin-bottom: 18px; }
.split__text p { color: var(--c-ink-2); margin-bottom: 12px; }
.split__img { width: 100%; height: 360px; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow); }
.split__media .img-placeholder { height: 360px; }

/* ---------- 清单 ---------- */
.check-list { margin-top: 14px; }
.check-list li { padding: 9px 0 9px 26px; border-bottom: 1px solid var(--c-line); position: relative; font-size: 15px; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 9px;
  color: var(--c-steel); font-weight: 700;
}

/* ---------- 数据统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-bottom: 40px; }
.stat { background: var(--c-panel); border-radius: var(--radius); box-shadow: var(--shadow);
  text-align: center; padding: 30px 16px; }
.stat strong { display: block; font-size: 36px; color: var(--c-ink); letter-spacing: 1px; }
.stat span { color: var(--c-ink-2); font-size: 14px; }

/* ---------- 案例卡片 ---------- */
.case-card { background: var(--c-panel); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.case-card__img { width: 100%; height: 220px; object-fit: cover; }
.case-card__body { padding: 20px 22px 24px; }
.case-card__body h3 { font-size: 17px; margin: 10px 0 8px; }
.case-card__body p { color: var(--c-ink-2); font-size: 14px; }
.tag {
  display: inline-block; font-size: 12px; padding: 2px 10px; border-radius: 3px;
  background: #e8ecf0; color: #55606c; border: 1px solid var(--c-silver-l);
}
.cases-intro { color: var(--c-ink-2); margin-bottom: 24px; max-width: 760px; }

/* ---------- 案例筛选 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.filter-bar__btn {
  padding: 8px 22px; background: #fff; border: 1px solid var(--c-silver-l);
  border-radius: 20px; font-size: 14px; color: var(--c-ink-2); cursor: pointer;
  font-family: inherit;
}
.filter-bar__btn:hover { border-color: var(--c-steel); color: var(--c-steel); }
.filter-bar__btn.is-active { background: var(--c-steel); border-color: var(--c-steel); color: #fff; }
.case-card.is-hidden { display: none; }

/* ---------- 规格表 ---------- */
.table-wrap { overflow-x: auto; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); }
.spec-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.spec-table th, .spec-table td { padding: 14px 20px; text-align: left; font-size: 15px; }
.spec-table thead th { background: #23282e; color: #dfe4e9; font-weight: 600; }
.spec-table tbody tr { border-bottom: 1px solid var(--c-line); }
.spec-table tbody tr:last-child { border-bottom: none; }
.spec-table tbody tr:hover { background: #f7f8fa; }

/* ---------- 流程 ---------- */
.flow-list { counter-reset: none; display: grid; gap: 16px; max-width: 820px; }
.flow-item { display: flex; gap: 20px; background: #fff; border-radius: var(--radius);
  padding: 22px 26px; box-shadow: var(--shadow); }
.flow-item__no {
  flex-shrink: 0; width: 46px; height: 46px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-silver); color: #55606c; font-weight: 700; border-radius: 4px;
}
.flow-item h3 { font-size: 17px; margin-bottom: 4px; }
.flow-item p { color: var(--c-ink-2); font-size: 14.5px; }

/* ---------- 品质简介 ---------- */
.quality-brief { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }

/* ---------- FAQ 折叠模块 ---------- */
.faq-list { max-width: 820px; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.faq-item__q {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; font-size: 16px; font-weight: 600; color: var(--c-ink);
  cursor: pointer; list-style: none;
}
.faq-item__q::-webkit-details-marker { display: none; }
.faq-item__q::after {
  content: "+"; flex-shrink: 0; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-silver-l); border-radius: 50%; font-size: 18px; color: var(--c-steel);
}
.faq-item[open] > .faq-item__q::after { content: "−"; }
.faq-item__a { padding: 0 22px 18px; color: var(--c-ink-2); font-size: 14.5px; line-height: 1.8; }
.quality-brief__img { width: 100%; height: 340px; object-fit: cover; border-radius: var(--radius); }
.quality-brief__media .img-placeholder { height: 340px; }
.quality-brief__text h2 { font-size: 26px; margin-bottom: 14px; }
.quality-brief__text p { color: var(--c-ink-2); margin-bottom: 20px; }

/* ---------- 底部询价引导条 ---------- */
.cta-band { background: linear-gradient(90deg, #1d2228, #2b323b); color: #eef1f4; padding: 54px 0; }
.cta-band__inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.cta-band h2 { font-size: 24px; margin-bottom: 8px; }
.cta-band p { color: #aeb7c0; font-size: 14.5px; max-width: 560px; }

/* ---------- 联系页 ---------- */
.contact-layout { display: grid; grid-template-columns: 380px 1fr; gap: 44px; align-items: start; }
.contact-info { background: #23282e; color: #dfe4e9; border-radius: var(--radius); padding: 34px 30px; }
.contact-info h2 { font-size: 22px; margin-bottom: 12px; color: #f2f4f6; }
.contact-info > p { color: #aeb7c0; font-size: 14.5px; margin-bottom: 20px; }
.contact-info__list li { padding: 12px 0; border-bottom: 1px solid rgba(185, 194, 204, .15); font-size: 15px; }
.contact-info__list li:last-child { border-bottom: none; }
.contact-info__list strong { display: inline-block; width: 72px; color: var(--c-silver); font-weight: 600; }
.contact-info__phone { color: #fff; font-size: 19px; font-weight: 700; }

/* ---------- 表单 ---------- */
.inquiry { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px 36px; }
.inquiry h2 { font-size: 22px; margin-bottom: 6px; }
.inquiry__tip { color: var(--c-ink-2); font-size: 14px; margin-bottom: 22px; }
.notice { padding: 13px 18px; border-radius: var(--radius); font-size: 14.5px; margin-bottom: 20px; }
.notice--ok { background: #e8f4ec; color: var(--c-ok); border: 1px solid #bcdccb; }
.notice--err { background: #fbeaea; color: var(--c-err); border: 1px solid #eec6c6; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form__field { display: block; margin-bottom: 18px; }
.form__label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.form__label em { color: var(--c-err); font-style: normal; }
.form__field--required { position: relative; }
.form__field--required::before {
  content: ""; position: absolute; left: 0; top: 28px; bottom: 0; width: 3px;
  background: var(--c-err); border-radius: 3px 0 0 3px;
}
.form__field--required input,
.form__field--required select,
.form__field--required textarea { padding-left: 17px; }
.form__field--file { background: #f7f9fb; border: 1px dashed var(--c-silver-l); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px; }
.form__field--file .form__file { padding: 8px 0; }
.form__field--file .form__hint { margin-bottom: 0; }
.form input[type="text"], .form input[type="tel"], .form input[type="email"],
.form select, .form textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--c-silver-l); border-radius: 4px;
  font-family: inherit; font-size: 15px; color: var(--c-ink); background: #fbfcfd;
  transition: border-color .15s;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--c-steel); background: #fff;
}
.form textarea { resize: vertical; min-height: 120px; }
.form__file { width: 100%; font-size: 14px; padding: 9px 0; }
.form__hint { display: block; font-size: 12.5px; color: var(--c-silver); margin-top: 5px; }
.form__submit { width: 100%; }
.form__privacy { font-size: 12.5px; color: var(--c-silver); margin-top: 12px; text-align: center; }
.hp-field { position: absolute; left: -9999px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #14171b; color: #9aa4af; }
.site-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 40px; padding: 56px 24px 40px; }
.site-footer__col h3 { color: #dfe4e9; font-size: 16px; margin-bottom: 14px; }
.site-footer__col p { font-size: 13.5px; line-height: 1.8; }
.site-footer__nav li, .site-footer__contact li { font-size: 13.5px; padding: 4px 0; }
.site-footer__nav a { color: #9aa4af; }
.site-footer__nav a:hover { color: #dfe4e9; }
.site-footer__contact a { color: #c3cad2; }
.site-footer__bottom { border-top: 1px solid rgba(185, 194, 204, .12); padding: 18px 0; font-size: 12.5px; text-align: center; }
.site-footer__bottom a { color: #7d8791; }

/* ---------- 页脚合规信息区（备案 / 安全负责人 / 隐私政策 / 安全声明） ---------- */
.site-footer__legal { text-align: center; }
.legal-line { margin: 6px 0; line-height: 1.85; color: #8b959f; }
.legal-line--copy { color: #a8b2bc; }
.legal-line--beian a { color: #9aa4af; }
.legal-line--beian a:hover { color: #dfe4e9; }
.legal-line--safety span { display: inline-block; margin: 0 8px; }
.legal-line--safety a { color: #9aa4af; text-decoration: underline; }
.legal-line--statement { max-width: 860px; margin: 10px auto 0; color: #7f8892; font-size: 12px; line-height: 1.9; }
.legal-line--statement a { color: #9aa4af; text-decoration: underline; }
.legal-sep { color: #4d565f; margin: 0 8px; }
/* 公安备案图标（纯 CSS 绘制，避免引入外部资源） */
.legal-police__icon {
  display: inline-block; width: 13px; height: 14px; margin-right: 5px;
  vertical-align: -2px; background: #5b6672;
  clip-path: polygon(50% 0, 100% 22%, 100% 62%, 50% 100%, 0 62%, 0 22%);
}

/* ---------- 验证码 ---------- */
.captcha-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.captcha-img {
  border: 1px solid var(--c-line, #d8dee6); border-radius: 6px;
  background: #f4f6f9; display: block;
}
.captcha-row input { flex: 1 1 140px; min-width: 120px; }
.captcha-refresh {
  border: 1px solid var(--c-line, #d8dee6); background: #fff; color: var(--c-slate, #5a6673);
  border-radius: 6px; padding: 9px 14px; font-size: 13px; cursor: pointer;
}
.captcha-refresh:hover { border-color: var(--c-accent, #1d6fd0); color: var(--c-accent, #1d6fd0); }
.form__label--required::after { content: " *"; color: var(--c-err, #c0392b); }

/* ---------- 错误页（404 / 403 / 500） ---------- */
.error-page__inner { text-align: center; padding: 70px 0 90px; }
.error-page__code {
  font-size: 76px; font-weight: 700; line-height: 1; color: var(--c-line, #d8dee6); letter-spacing: 2px;
}
.error-page__title { font-size: 22px; margin: 14px 0 10px; }
.error-page__desc { color: var(--c-silver, #8a939d); margin-bottom: 26px; }
.error-page__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.error-page__hint { margin-top: 26px; font-size: 12.5px; color: var(--c-silver, #8a939d); }

/* ---------- 法律页（隐私政策） ---------- */
.page-legal { background: #fff; }
.legal-header { border-bottom: 1px solid var(--c-line, #e3e8ee); background: #fff; }
.legal-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 16px 24px; flex-wrap: wrap;
}
.legal-header__brand { font-size: 16px; font-weight: 600; color: var(--c-ink, #1c2530); }
.legal-header__nav { display: flex; gap: 18px; font-size: 14px; }
.legal-header__nav a { color: var(--c-slate, #5a6673); }
.legal-header__nav a:hover { color: var(--c-accent, #1d6fd0); }
.legal-main { max-width: 860px; padding: 40px 24px 70px; }
.legal-main__title { font-size: 28px; margin-bottom: 8px; }
.legal-main__meta { font-size: 13px; color: var(--c-silver, #8a939d); margin-bottom: 22px; }
.legal-main__lead {
  background: #f6f8fa; border-left: 3px solid var(--c-accent, #1d6fd0);
  padding: 14px 18px; font-size: 14px; line-height: 1.9; margin-bottom: 30px; color: var(--c-ink, #1c2530);
}
.legal-sec { margin-bottom: 30px; }
.legal-sec h2 { font-size: 18px; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--c-line, #e3e8ee); }
.legal-sec h3 { font-size: 15px; margin: 18px 0 8px; color: var(--c-ink, #1c2530); }
.legal-sec p, .legal-sec li { font-size: 14.5px; line-height: 1.95; color: #47535f; }
.legal-sec ul { padding-left: 22px; }
.legal-sec li { margin: 6px 0; list-style: disc; }
.legal-sec a { color: var(--c-accent, #1d6fd0); text-decoration: underline; }
.legal-main__back { margin-top: 36px; font-size: 14px; }
.legal-main__back a { color: var(--c-accent, #1d6fd0); }

/* ============================================================
   移动端自适应（≤ 900px）
   ============================================================ */
@media (max-width: 900px) {
  :root { --header-h: 60px; }
  .container { padding: 0 16px; }
  body { font-size: 15px; padding-top: var(--header-h); padding-bottom: 56px; }

  /* 顶部导航：汉堡折叠菜单 */
  .nav-toggle {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 44px; height: 44px; background: transparent; border: none; cursor: pointer;
    padding: 8px;
  }
  .nav-toggle span { display: block; height: 2px; background: #dfe4e9; transition: transform .2s, opacity .2s; }
  .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); }

  .main-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: #1d2126; flex-direction: column; align-items: stretch;
    padding: 16px 20px 32px; gap: 0;
    transform: translateX(100%); transition: transform .22s ease;
    overflow-y: auto; z-index: 99;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav ul a { padding: 15px 6px; font-size: 16px; border-bottom: 1px solid rgba(185, 194, 204, .12); }
  .main-nav ul li.is-active a::after { display: none; }
  .main-nav__cta { margin-top: 22px; }

  /* 移动端底部快捷条 */
  .mobile-bar {
    display: flex; position: fixed; bottom: 0; left: 0; right: 0; z-index: 98;
    background: #1d2126; border-top: 1px solid rgba(185, 194, 204, .2);
  }
  .mobile-bar a { flex: 1; text-align: center; padding: 14px 0; font-size: 15px; font-weight: 600; }
  .mobile-bar__call { color: #dfe4e9; border-right: 1px solid rgba(185, 194, 204, .2); }
  .mobile-bar__quote { background: var(--c-steel); color: #fff; }

  /* 版面缩放 */
  .section { padding: 48px 0; }
  .hero { min-height: 520px; }
  .hero__title { font-size: 28px; }
  .hero__desc { font-size: 14.5px; }
  .page-hero { padding: 40px 0 36px; }
  .page-hero h1 { font-size: 26px; }
  .section-head h2 { font-size: 22px; }

  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .split, .quality-brief { grid-template-columns: 1fr; gap: 24px; }
  .split__media { order: -1; }
  .split__img, .split__media .img-placeholder { height: 240px; }
  .photo__img { height: 210px; }
  .photo--wide .photo__img { height: 230px; }
  .stats { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .stat { padding: 18px 6px; }
  .stat strong { font-size: 24px; }
  .stat span { font-size: 12px; }

  .contact-layout { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; gap: 0; }
  .inquiry { padding: 24px 18px; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .site-footer__grid { grid-template-columns: 1fr; gap: 26px; padding: 40px 16px 30px; }

  /* 首屏数字卡片：移动端改为横向三列 */
  .hero__content { flex-direction: column; align-items: flex-start; gap: 34px; }
  .hero__stats { flex-direction: row; width: 100%; gap: 10px; }
  .hero-stat { flex: 1; padding: 16px 8px; }
  .hero-stat__num { font-size: 20px; }
  .hero-stat__txt { font-size: 12px; }

  /* 信任条：移动端垂直堆叠 */
  .cert-strip__inner { flex-direction: column; gap: 10px; text-align: center; }
  .cert-strip__divider { width: 40px; height: 1px; }
}

/* 小屏手机微调 */
@media (max-width: 480px) {
  .brand { gap: 8px; }
  .brand__sub { display: none; }
  .brand__img { max-width: 120px; height: 30px; }
  .brand__name { font-size: 15px; }
  .hero__title { font-size: 24px; }
  .stats { grid-template-columns: 1fr 1fr 1fr; }
  .hero__stats { flex-direction: column; }
  .hero-stat { flex: none; }
}

/* ============================================================
   滚动渐显动画（柔和克制，B端专业观感）
   原理：JS（IntersectionObserver）给进入可视区的元素加 .is-visible；
   .reveal 初始态仅在 html.js 下生效，无 JS 环境内容照常显示。
   ============================================================ */
/* 仅在 JS 动画系统成功就绪后才隐藏元素；若 main.js 加载失败或未执行到末尾，内容保持可见 */
html.js.js-anim .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
  will-change: opacity, transform;
}
html.js.js-anim .reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* 用户系统设置"减弱动态效果"时：直接显示，不做动画 */
@media (prefers-reduced-motion: reduce) {
  html.js.js-anim .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}