/* =========================================================
   四川洁安环境科技有限公司 · 企业官网样式（多页面版）
   色彩体系：深青/墨绿（主）+ 暖灰/浅砂（辅）+ 低饱和铜色/水蓝（点缀）
   ========================================================= */

:root {
  /* 主色：深青 / 墨绿 */
  --teal-950: #082223;
  --teal-900: #0B2B2C;
  --teal-800: #0F3D3E;
  --teal-700: #14524F;
  --teal-600: #1C6B62;
  --teal-500: #2A8276;

  /* 辅色：暖灰 / 浅砂 */
  --sand-50: #F8F6F1;
  --sand-100: #EFEAE0;
  --sand-200: #E3DCCC;
  --sand-300: #C9BFA8;
  --warm-gray: #6E675C;
  --warm-gray-light: #948C7E;

  /* 点缀色 */
  --copper: #B07A4A;
  --copper-soft: #C99B6F;
  --water: #4E97B3;

  /* 基础 */
  --ink: #22302E;
  --white: #FFFFFF;
  --danger: #C4674E;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-sm: 0 2px 8px rgba(11, 43, 44, 0.06);
  --shadow-md: 0 8px 28px rgba(11, 43, 44, 0.12);
  --shadow-lg: 0 16px 48px rgba(11, 43, 44, 0.18);
  --header-h: 72px;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--white);
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* ---------- 通用布局 ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--sand-50);
}

.section-head {
  max-width: 760px;
  margin: 0 auto 52px;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--copper);
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  color: var(--teal-800);
  letter-spacing: 1px;
}

.section-lead {
  margin-top: 12px;
  font-size: 15px;
  color: var(--warm-gray);
}

.section-more {
  text-align: center;
  margin-top: 40px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  line-height: 1.2;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.btn svg {
  width: 17px;
  height: 17px;
  flex: none;
}

.btn-primary {
  background: var(--teal-700);
  color: var(--sand-50);
}

.btn-primary:hover {
  background: var(--teal-600);
  transform: translateY(-1px);
}

.btn-ghost {
  border-color: rgba(247, 244, 238, 0.65);
  color: var(--sand-50);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost:hover {
  border-color: var(--sand-50);
  background: rgba(255, 255, 255, 0.12);
}

.btn-outline {
  border-color: var(--sand-300);
  color: var(--teal-800);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--teal-700);
  color: var(--teal-700);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--teal-600);
  transition: color 0.2s ease, gap 0.2s ease;
}

.btn-link:hover {
  color: var(--copper);
  gap: 10px;
}

.btn-link svg {
  width: 15px;
  height: 15px;
}

.btn-block {
  width: 100%;
}

.btn[disabled],
.btn.disabled {
  opacity: 0.45;
  pointer-events: none;
}

/* ---------- 滚动淡入动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 34, 35, 0.55), rgba(8, 34, 35, 0));
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.site-header.scrolled,
.site-header.solid {
  background: rgba(255, 255, 255, 0.97);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(11, 43, 44, 0.08), var(--shadow-sm);
}

.site-header.scrolled::before,
.site-header.solid::before {
  opacity: 0;
}

.header-inner {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--teal-800);
  color: var(--sand-100);
  flex: none;
}

.brand-mark svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--sand-50);
}

.brand-text small {
  font-size: 11px;
  letter-spacing: 0.5px;
  color: rgba(239, 234, 224, 0.72);
}

.site-header.scrolled .brand-text strong,
.site-header.solid .brand-text strong {
  color: var(--teal-800);
}

.site-header.scrolled .brand-text small,
.site-header.solid .brand-text small {
  color: var(--warm-gray);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 1px;
  color: rgba(247, 244, 238, 0.88);
  border-radius: var(--radius);
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--copper);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.site-header.scrolled .nav-link,
.site-header.solid .nav-link {
  color: var(--ink);
}

.site-header.scrolled .nav-link.active,
.site-header.solid .nav-link.active {
  color: var(--teal-800);
  font-weight: 700;
}

.header-contacts {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: none;
}

.header-contacts a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(247, 244, 238, 0.4);
  color: var(--sand-50);
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.header-contacts a:hover {
  background: var(--copper);
  border-color: var(--copper);
}

.header-contacts svg {
  width: 16px;
  height: 16px;
}

.site-header.scrolled .header-contacts a,
.site-header.solid .header-contacts a {
  border-color: var(--sand-200);
  color: var(--teal-800);
}

.site-header.scrolled .header-contacts a:hover,
.site-header.solid .header-contacts a:hover {
  color: var(--sand-50);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: none;
  z-index: 120;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--sand-50);
  transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
}

.site-header.scrolled .nav-toggle span,
.site-header.solid .nav-toggle span,
.nav-toggle.is-open span {
  background: var(--teal-800);
}

.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);
}

/* 移动端全屏菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: var(--teal-900);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 96px 32px 48px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
}

.mobile-nav a {
  padding: 14px 4px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--sand-100);
  border-bottom: 1px solid rgba(239, 234, 224, 0.12);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--copper-soft);
}

.mobile-contacts {
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-contacts a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: rgba(239, 234, 224, 0.8);
}

.mobile-contacts svg {
  width: 17px;
  height: 17px;
  color: var(--copper-soft);
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--teal-900);
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 34, 35, 0.82) 0%, rgba(8, 34, 35, 0.6) 45%, rgba(8, 34, 35, 0.32) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: var(--header-h);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid rgba(201, 155, 111, 0.55);
  border-radius: 999px;
  background: rgba(8, 34, 35, 0.35);
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--copper-soft);
  margin-bottom: 26px;
}

.hero-tag-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--copper-soft);
  flex: none;
}

.hero-title {
  max-width: 780px;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 1.5px;
  color: var(--sand-50);
  text-shadow: 0 2px 18px rgba(8, 34, 35, 0.35);
}

.hero-sub {
  max-width: 700px;
  margin-top: 22px;
  font-size: clamp(14px, 1.6vw, 17px);
  letter-spacing: 0.5px;
  color: rgba(239, 234, 224, 0.9);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(239, 234, 224, 0.7);
  animation: heroFloat 2.4s ease-in-out infinite;
}

.hero-scroll svg {
  width: 22px;
  height: 22px;
}

@keyframes heroFloat {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ---------- 子页面横幅 ---------- */
.page-banner {
  position: relative;
  padding: calc(var(--header-h) + 58px) 0 54px;
  background:
    radial-gradient(circle at 82% 18%, rgba(28, 107, 98, 0.5) 0, transparent 46%),
    radial-gradient(circle at 12% 88%, rgba(176, 122, 74, 0.22) 0, transparent 40%),
    linear-gradient(120deg, var(--teal-900), var(--teal-800) 60%, var(--teal-700));
  color: var(--sand-50);
}

.page-banner h1 {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: 2px;
}

.page-banner .banner-lead {
  margin-top: 10px;
  font-size: 14.5px;
  letter-spacing: 1px;
  color: rgba(239, 234, 224, 0.72);
}

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: rgba(239, 234, 224, 0.6);
}

.crumbs a {
  color: rgba(239, 234, 224, 0.8);
  transition: color 0.2s ease;
}

.crumbs a:hover {
  color: var(--copper-soft);
}

.crumbs .crumbs-sep {
  color: rgba(239, 234, 224, 0.4);
}

.crumbs-light {
  color: var(--warm-gray-light);
}

.crumbs-light a {
  color: var(--warm-gray);
}

.crumbs-light a:hover {
  color: var(--copper);
}

.crumbs-light .crumbs-sep {
  color: var(--sand-300);
}

/* ---------- 数据卡片 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.stat-card {
  background: var(--sand-50);
  border: 1px solid var(--sand-200);
  border-top: 3px solid var(--copper);
  border-radius: var(--radius);
  padding: 30px 20px 26px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.section-alt .stat-card {
  background: var(--white);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-num {
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--teal-800);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}

.stat-unit {
  font-size: 0.42em;
  font-weight: 600;
  color: var(--warm-gray);
  margin-left: 6px;
  letter-spacing: 0;
}

.stat-label {
  margin-top: 10px;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--warm-gray);
}

/* ---------- 关于页 ---------- */
.about-intro-lg {
  max-width: 900px;
  margin: 0 auto 56px;
  text-align: center;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 2.1;
  color: #3D4A47;
}

.compliance-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  background: var(--teal-800);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
}

.compliance-title {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--copper-soft);
  flex: none;
}

.compliance-title svg {
  width: 17px;
  height: 17px;
}

.compliance-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.compliance-tags li {
  padding: 6px 14px;
  border: 1px solid rgba(239, 234, 224, 0.28);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--sand-100);
  background: rgba(255, 255, 255, 0.04);
}

/* ---------- 核心业务卡片 ---------- */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.biz-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.biz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius);
  padding: 30px 24px 24px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.section-alt .biz-card {
  background: var(--white);
}

.biz-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--teal-600);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.biz-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.biz-card:hover::before {
  transform: scaleX(1);
}

.biz-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: var(--sand-100);
  color: var(--teal-700);
  margin-bottom: 18px;
}

.biz-icon svg {
  width: 26px;
  height: 26px;
}

.biz-card h3 {
  font-size: 17.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--teal-800);
  margin-bottom: 10px;
}

.biz-card > p {
  font-size: 13.8px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.biz-flow {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--sand-200);
  font-size: 12.5px;
  letter-spacing: 0.3px;
  color: var(--teal-600);
  font-weight: 500;
}

.biz-more {
  margin-top: auto;
  padding-top: 18px;
}

/* 业务页放大版卡片 */
.biz-card-lg {
  padding: 38px 30px 28px;
}

.biz-card-lg .biz-icon {
  width: 60px;
  height: 60px;
}

.biz-card-lg .biz-icon svg {
  width: 30px;
  height: 30px;
}

.biz-card-lg h3 {
  font-size: 19.5px;
}

.biz-card-lg > p {
  font-size: 14.5px;
}

/* ---------- 处理工艺 ---------- */
.process-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: start;
}

.process-steps {
  position: relative;
}

.process-steps::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--sand-200);
}

.process-step {
  position: relative;
  display: flex;
  gap: 22px;
  padding: 18px 0;
}

.step-index {
  position: relative;
  z-index: 1;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--sand-100);
  border: 2px solid var(--sand-200);
  color: var(--warm-gray);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  transition: background-color 0.5s ease, border-color 0.5s ease, color 0.5s ease, box-shadow 0.5s ease;
}

.section-alt .step-index {
  background: var(--white);
}

.step-index svg {
  width: 22px;
  height: 22px;
}

.step-body h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--teal-800);
  margin: 4px 0 6px;
}

.step-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--warm-gray);
  max-width: 460px;
}

/* 逐段点亮 */
.process-step.lit .step-index {
  background: var(--teal-700);
  border-color: var(--teal-700);
  color: var(--sand-50);
  box-shadow: 0 0 0 6px rgba(28, 107, 98, 0.14);
}

.process-step.step-result.lit .step-index {
  background: var(--copper);
  border-color: var(--copper);
}

/* 工艺示意图 */
.process-figure {
  position: relative;
  background: var(--sand-50);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius-lg);
  padding: 56px 26px 30px;
}

.section-alt .process-figure {
  background: var(--white);
}

.process-svg {
  width: 100%;
  height: auto;
  margin: 0 auto;
  display: block;
  max-width: 400px;
}

.process-svg text {
  font-family: var(--font-sans);
}

.smart-tag {
  position: absolute;
  top: 16px;
  right: 16px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--teal-800);
  color: var(--sand-100);
  font-size: 12.5px;
  letter-spacing: 1px;
  box-shadow: var(--shadow-sm);
}

.smart-tag svg {
  width: 15px;
  height: 15px;
  color: var(--copper-soft);
}

/* ---------- 新闻列表 ---------- */
.news-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.news-item {
  display: flex;
  gap: 26px;
  align-items: flex-start;
  background: var(--white);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.news-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--teal-600);
}

.news-date {
  flex: none;
  width: 96px;
  text-align: center;
  padding: 10px 6px;
  border-radius: var(--radius);
  background: var(--teal-800);
  color: var(--sand-50);
}

.news-date strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
}

.news-date span {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--copper-soft);
}

.news-body h3 {
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--teal-800);
  line-height: 1.6;
  transition: color 0.2s ease;
}

.news-item:hover .news-body h3 {
  color: var(--teal-600);
}

.news-body p {
  margin-top: 6px;
  font-size: 13.8px;
  line-height: 1.8;
  color: var(--warm-gray);
}

.news-meta {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  font-size: 12px;
  color: var(--warm-gray-light);
}

.news-cat {
  padding: 3px 11px;
  border-radius: 999px;
  border: 1px solid var(--sand-200);
  background: var(--sand-50);
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--teal-700);
}

.news-source {
  color: var(--teal-600);
}

/* ---------- 新闻详情 ---------- */
.article-wrap {
  max-width: 840px;
  margin: 0 auto;
}

.article-card {
  background: var(--white);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 56px);
  box-shadow: var(--shadow-sm);
}

.article-title {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.5px;
  color: var(--teal-800);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  margin: 18px 0 26px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--sand-200);
  font-size: 13px;
  color: var(--warm-gray-light);
}

.article-body p {
  margin-bottom: 18px;
  font-size: 15.5px;
  line-height: 2.05;
  color: #3D4A47;
  text-align: justify;
}

.article-body p:last-child {
  margin-bottom: 0;
}

.article-body .article-sub {
  margin: 30px 0 12px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--teal-900);
}

.article-body .article-list {
  margin: 0 0 18px;
  padding-left: 24px;
  font-size: 15.5px;
  line-height: 2.0;
  color: #3D4A47;
}

.article-body .article-list li {
  margin: 6px 0;
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--sand-200);
}

.article-nav .btn {
  padding: 10px 20px;
  font-size: 13.5px;
}

/* ---------- 联系我们 ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: start;
}

.contact-card {
  background: var(--white);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

.contact-card h3 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--teal-800);
  margin-bottom: 22px;
}

.contact-card h3 svg {
  width: 20px;
  height: 20px;
  color: var(--copper);
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-list li {
  display: flex;
  gap: 13px;
}

.contact-list .ci-icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: var(--sand-100);
  color: var(--teal-700);
}

.contact-list .ci-icon svg {
  width: 20px;
  height: 20px;
}

.contact-list .ci-label {
  display: block;
  font-size: 12.5px;
  letter-spacing: 1px;
  color: var(--warm-gray-light);
}

.contact-list .ci-value {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
}

.contact-list a.ci-value {
  color: var(--teal-700);
  border-bottom: 1px dashed var(--sand-300);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.contact-list a.ci-value:hover {
  color: var(--copper);
  border-color: var(--copper);
}

.contact-note {
  margin-top: 24px;
  padding: 14px 18px;
  border-left: 3px solid var(--copper);
  background: var(--sand-50);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13.5px;
  color: var(--warm-gray);
}

/* 浅色表单 */
.form-card {
  background: var(--white);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-sm);
}

.form-card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--teal-800);
  margin-bottom: 6px;
}

.form-card .form-sub {
  margin-bottom: 22px;
  font-size: 13px;
  color: var(--warm-gray-light);
}

.form-card form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row label {
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--warm-gray);
}

.form-row label em {
  font-style: normal;
  color: var(--copper);
}

.form-row input,
.form-row textarea {
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--sand-50);
  border: 1px solid var(--sand-200);
  border-radius: var(--radius);
  padding: 11px 14px;
  outline: none;
  resize: vertical;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.form-row input::placeholder,
.form-row textarea::placeholder {
  color: var(--warm-gray-light);
}

.form-row input:focus,
.form-row textarea:focus {
  border-color: var(--teal-600);
  background: var(--white);
}

.form-row input.invalid,
.form-row textarea.invalid {
  border-color: var(--danger);
}

.form-error {
  min-height: 16px;
  font-size: 12px;
  line-height: 1.3;
  color: var(--danger);
}

.form-tip {
  font-size: 12px;
  line-height: 1.7;
  color: var(--warm-gray-light);
}

.form-tip.success {
  color: var(--teal-600);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--teal-950);
  color: rgba(239, 234, 224, 0.82);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(239, 234, 224, 0.12);
}

.footer-logo {
  margin-bottom: 18px;
}

.footer-logo .brand-mark {
  background: var(--teal-700);
}

.footer-desc {
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(239, 234, 224, 0.62);
  max-width: 420px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 22px;
}

.footer-nav a {
  font-size: 13.5px;
  letter-spacing: 1px;
  color: rgba(239, 234, 224, 0.75);
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--copper-soft);
}

.site-footer h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--sand-50);
  margin-bottom: 18px;
}

.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact li {
  display: flex;
  gap: 11px;
  font-size: 13.8px;
  line-height: 1.7;
}

.footer-contact li svg {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 4px;
  color: var(--copper-soft);
}

.footer-contact a {
  color: var(--sand-100);
  border-bottom: 1px dashed rgba(239, 234, 224, 0.3);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-contact a:hover {
  color: var(--copper-soft);
  border-color: var(--copper-soft);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding: 22px 0 26px;
  font-size: 12.5px;
  letter-spacing: 0.5px;
  color: rgba(239, 234, 224, 0.45);
}

.footer-notice {
  color: var(--copper-soft);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .section {
    padding: 72px 0;
  }

  .biz-grid,
  .biz-grid.cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-layout {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .process-figure {
    max-width: 560px;
    margin: 0 auto;
    width: 100%;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 860px) {
  .main-nav,
  .header-contacts {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-header::before {
    opacity: 0;
  }

  .site-header {
    background: rgba(8, 34, 35, 0.92);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }

  .site-header.scrolled,
  .site-header.solid {
    background: rgba(255, 255, 255, 0.97);
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 18px;
  }

  .section {
    padding: 56px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .hero {
    min-height: 88vh;
  }

  .hero-overlay {
    background: linear-gradient(180deg, rgba(8, 34, 35, 0.78), rgba(8, 34, 35, 0.55));
  }

  .hero-cta .btn {
    width: 100%;
  }

  .hero-scroll {
    display: none;
  }

  .page-banner {
    padding: calc(var(--header-h) + 40px) 0 40px;
  }

  .about-intro-lg {
    text-align: left;
    font-size: 15.5px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-card {
    padding: 22px 14px 20px;
  }

  .compliance-bar {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  .biz-grid,
  .biz-grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .process-steps::before {
    left: 22px;
  }

  .step-index {
    width: 46px;
    height: 46px;
    font-size: 14px;
  }

  .process-step {
    gap: 16px;
  }

  .news-item {
    flex-direction: column;
    gap: 14px;
    padding: 20px;
  }

  .news-date {
    width: auto;
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    padding: 6px 12px;
  }

  .news-date span {
    margin-top: 0;
  }

  .article-nav {
    flex-direction: column;
  }

  .article-nav .btn {
    width: 100%;
  }

  .contact-card,
  .form-card {
    padding: 26px 22px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}