/* ==========================================================
   欧欧眼保仪官网 - 首页样式
   ========================================================== */
:root {
  --c-primary: #2bb8e8;        /* 导航高亮蓝 */
  --c-purple: #8f6fd0;         /* 招商加盟紫 */
  --c-purple-deep: #7d5cc9;
  --c-red: #c0392f;            /* 首屏红 */
  --c-dark: #17171b;           /* 导航黑 */
  --c-footer: #232329;         /* 页脚深灰 */
  --c-text: #333;
  --c-text-light: #888;
  --c-border: #e5e5e5;
  --container: 1080px;
  --nav-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--c-text);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

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

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

.section { padding: 90px 0 70px; }

/* ======================== 顶部导航 ======================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(0, 0, 0, .92);
  z-index: 100;
  transition: background .3s;
}
.navbar.scrolled { background: rgba(0, 0, 0, .98); box-shadow: 0 2px 10px rgba(0,0,0,.3); }

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

.logo { display: flex; align-items: center; gap: 8px; }
.logo-icon { width: 44px; height: auto; }
.logo-text {
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
}

.nav-menu { display: flex; }
.nav-menu a {
  color: #fff;
  font-size: 15px;
  padding: 0 22px;
  line-height: var(--nav-h);
  display: block;
  transition: color .2s;
}
.nav-menu a:hover { color: var(--c-primary); }
.nav-menu a.active { color: var(--c-primary); }

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: none; border: none;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: #fff;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ======================== 首屏 Banner ======================== */
.hero {
  position: relative;
  margin-top: var(--nav-h);
  min-height: 640px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--c-red);
}
/* 背景照片墙：用渐变 + 网格纹理模拟红色蒙版照片墙，可替换为真实图片 */
.hero-bg {
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 118px, rgba(255,255,255,.06) 118px 120px),
    repeating-linear-gradient(90deg, transparent 0 118px, rgba(255,255,255,.06) 118px 120px),
    radial-gradient(ellipse 40% 55% at 15% 25%, rgba(255,255,255,.14), transparent 70%),
    radial-gradient(ellipse 35% 50% at 85% 30%, rgba(0,0,0,.18), transparent 70%),
    radial-gradient(ellipse 45% 40% at 55% 85%, rgba(255,255,255,.1), transparent 70%),
    linear-gradient(160deg, #cd4438 0%, #b7332a 55%, #a52d25 100%);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(120,20,14,.15), rgba(90,15,10,.35));
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  padding: 60px 24px 140px;
}
.hero-title {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: 6px;
  margin-bottom: 60px;
  text-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.hero-sub {
  font-size: 16px;
  letter-spacing: 2px;
  padding: 18px 0;
  border-top: 1px solid rgba(255,255,255,.75);
  border-bottom: 1px solid rgba(255,255,255,.75);
  max-width: 560px;
  margin: 0 auto;
}
.hero-bottom {
  position: absolute;
  bottom: 34px; left: 0; right: 0;
  z-index: 1;
  text-align: center;
  color: #fff;
  font-size: 15px;
  line-height: 1.9;
  letter-spacing: 1px;
}

/* ======================== 通用版式头 ======================== */
.section-head { text-align: center; margin-bottom: 40px; position: relative; }

.watermark-head { padding-top: 30px; }
.watermark {
  display: block;
  font-size: 64px;
  font-weight: 800;
  color: #efefef;
  line-height: 1;
  user-select: none;
  margin-bottom: -38px;
}
.watermark.inline {
  display: inline-block;
  font-size: 40px;
  margin-bottom: 0;
  vertical-align: middle;
  margin-left: 16px;
}

.section-title {
  position: relative;
  font-size: 34px;
  font-weight: 700;
  color: #1c1c1c;
  letter-spacing: 2px;
}
.section-title.light { color: #fff; }

.section-desc {
  max-width: 760px;
  margin: 26px auto 0;
  font-size: 14px;
  line-height: 2;
  color: var(--c-text-light);
}
.section-desc.light { color: rgba(255,255,255,.85); }

.v-divider {
  display: block;
  width: 1px; height: 34px;
  background: #bbb;
  margin: 22px auto 0;
}

/* ======================== 关于我们 ======================== */
.about-text {
  max-width: 860px;
  margin: 30px auto 70px;
  font-size: 15px;
  line-height: 2.2;
  color: #555;
}
.about-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}
.about-col { text-align: center; }
.about-col h3 {
  font-size: 18px;
  font-weight: 600;
  color: #222;
  margin-bottom: 20px;
}
.about-col p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--c-text-light);
}

/* ======================== 我们的服务 ======================== */
.service {
  position: relative;
  padding: 80px 0 0;
  overflow: hidden;
  background: #1d3350;
}
/* 深蓝城市夜景背景：渐变模拟，可替换为真实城市夜景图 */
.service-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 30% at 70% 100%, rgba(240,180,80,.28), transparent 65%),
    radial-gradient(ellipse 40% 20% at 25% 100%, rgba(120,160,255,.18), transparent 70%),
    linear-gradient(180deg, #16263e 0%, #1e3a5f 55%, #274a75 100%);
}
.service .container { position: relative; z-index: 1; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: 250px 220px;
}
.service-card {
  position: relative;
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.card-en {
  font-size: 13px;
  margin-bottom: 10px;
  opacity: .65;
}
.service-card h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 18px;
}
.service-card p {
  font-size: 14px;
  line-height: 1.9;
  opacity: .8;
}

.card-white { background: #fff; color: #333; }
.card-purple { background: var(--c-purple); color: #fff; }
.card-purple .card-en { opacity: .85; }
.card-dark { background: #2e2e35; color: #fff; }

.card-photo {
  background: linear-gradient(135deg, #6b7f96 0%, #46586e 45%, #2c3a4c 100%);
  color: #fff;
  justify-content: flex-end;
}
/* 模拟建筑图片：可替换为 background-image 真实图片 */
.card-photo::before {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(115deg, transparent 55%, rgba(255,255,255,.16) 55.2% 70%, transparent 70.2%),
    linear-gradient(65deg, transparent 60%, rgba(255,255,255,.12) 60.2% 78%, transparent 78.2%),
    linear-gradient(180deg, transparent 40%, rgba(0,0,0,.35));
}
.card-photo-inner { position: relative; }

.card-more { background: #fff; color: #333; }
.card-more h3 { font-size: 26px; }
.card-more p { opacity: .7; }

/* 箭头按钮 */
.arrow-btn {
  position: absolute;
  right: 22px; bottom: 20px;
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.5);
  transition: background .25s, transform .25s;
}
.card-white .arrow-btn,
.card-more .arrow-btn { color: #666; border-color: #ccc; background: transparent; }
.arrow-btn:hover { background: rgba(255,255,255,.3); transform: translateX(4px); }
.card-white .arrow-btn:hover,
.card-more .arrow-btn:hover { background: #f2f2f2; }

/* ======================== 我们的优势 ======================== */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px 64px;
  margin-top: 64px;
}
.adv-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.adv-icon {
  flex: 0 0 64px;
  width: 64px; height: 64px;
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #555;
  transition: color .25s, border-color .25s;
}
.adv-icon svg { width: 36px; height: 36px; }
.adv-item:hover .adv-icon { color: var(--c-purple); border-color: var(--c-purple); }
.adv-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--c-purple);
  margin-bottom: 10px;
}
.adv-body p {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--c-text-light);
}

/* ======================== 页脚 ======================== */
.footer {
  background: var(--c-footer);
  color: #9a9aa2;
  padding: 56px 0 30px;
  font-size: 13px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}
.footer-brand .logo-text { font-size: 20px; }
.footer-copy { margin-top: 16px; }
.footer-beian { margin-top: 8px; opacity: .7; }

.footer-hotline {
  display: flex;
  justify-content: center;
  border-left: 1px solid #3a3a42;
  border-right: 1px solid #3a3a42;
  padding: 0 20px;
}
.hotline-item { text-align: center; }
.hotline-label { margin-bottom: 12px; }
.hotline-num {
  font-size: 26px;
  color: #fff;
  font-family: "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 1px;
}

.footer-social { text-align: left; }
.social-label { margin-bottom: 16px; }
.social-icons { display: flex; gap: 14px; }
.social-icon {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform .25s, opacity .25s;
}
.social-icon:hover { transform: translateY(-3px); }
.social-icon svg { width: 22px; height: 22px; fill: #fff; }
.social-icon.wechat { background: #2aae67; }
.social-icon.douyin { background: #111; border: 1px solid #444; }
.social-icon.weibo { background: #e6442e; }

/* ======================== 响应式 ======================== */
@media (max-width: 900px) {
  .section { padding: 64px 0 48px; }
  .hero-title { font-size: 36px; letter-spacing: 3px; }
  .watermark { font-size: 44px; margin-bottom: -26px; }
  .watermark.inline { font-size: 26px; }
  .about-cols { grid-template-columns: 1fr; gap: 36px; }
  .service-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .service-card { min-height: 220px; }
  .adv-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; }
  .footer-brand .logo { justify-content: center; }
  .footer-hotline { border: none; padding: 24px 0; }
  .footer-social { text-align: center; }
  .social-icons { justify-content: center; }
}

@media (max-width: 600px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    background: rgba(0,0,0,.96);
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .nav-menu.open { max-height: 420px; }
  .nav-menu a { line-height: 50px; padding: 0 28px; border-top: 1px solid rgba(255,255,255,.08); }

  .hero { min-height: 520px; }
  .hero-title { font-size: 28px; margin-bottom: 36px; }
  .hero-sub { font-size: 13px; }
  .hero-bottom { font-size: 13px; padding: 0 16px; }

  .service-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; gap: 32px; }
  .section-title { font-size: 26px; }
}

/* ==========================================================
   子页面通用 + 政企合作页
   ========================================================== */

/* 页面 Banner */
.page-banner {
  position: relative;
  margin-top: var(--nav-h);
  padding: 96px 24px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  background: #1d3350;
}
.page-banner-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 50% 70% at 75% 110%, rgba(240,180,80,.25), transparent 65%),
    radial-gradient(ellipse 45% 60% at 15% -10%, rgba(120,180,255,.22), transparent 70%),
    linear-gradient(135deg, #16263e 0%, #24466e 60%, #2e567f 100%);
}
.page-banner-inner { position: relative; z-index: 1; }
.page-banner h1 { font-size: 40px; letter-spacing: 6px; margin-bottom: 14px; }
.page-banner p { font-size: 15px; letter-spacing: 2px; opacity: .85; }

/* 1. 防控体系 */
.sys-section { padding: 90px 0 100px; background: #fbfbfb; }
.sys-head { text-align: center; margin-bottom: 56px; }
.sys-head h2 { font-size: 32px; font-weight: 700; color: #1c1c1c; margin-bottom: 14px; }
.sys-head p { font-size: 15px; color: #777; }
.head-line { display: block; width: 40px; height: 3px; background: #999; margin: 22px auto 0; }

.sys-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 960px;
  margin: 0 auto;
  box-shadow: 0 12px 40px rgba(70,110,180,.18);
}
.sys-col {
  color: #fff;
  text-align: center;
  padding: 56px 30px 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.sys-col.col-1 { background: linear-gradient(180deg, #6fa3dd, #5f96d4); }
.sys-col.col-2 { background: linear-gradient(180deg, #5b90d6, #4a7fc8); }
.sys-col.col-3 { background: linear-gradient(180deg, #4a7fc8, #3a6cb8); }
.sys-icon svg { width: 52px; height: 52px; }
.sys-col h3 { font-size: 22px; font-weight: 600; margin: 28px 0 26px; letter-spacing: 1px; }
.sys-col ul li {
  font-size: 14px;
  line-height: 2.2;
  opacity: .95;
}
.sys-col ul li.strong { font-weight: 700; font-size: 15px; }
.sys-sub { margin-top: 8px; }
.sys-sub + .sys-sub { margin-top: 28px; }
.sys-sub h4 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.sys-sub p { font-size: 13.5px; line-height: 1.9; opacity: .95; }

/* 2-6. 特性区块 */
.feature-section { padding: 96px 0; background: #fff; }
.feature-section.alt { background: #f6f6f6; }
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}
.feature-title {
  font-size: 30px;
  font-weight: 700;
  color: #1c1c1c;
  margin-bottom: 22px;
}
.feature-sub { font-size: 14px; color: #888; margin: -14px 0 22px; }
.feature-line {
  display: block;
  width: 150px; height: 2px;
  background: #7b68c8;
  margin-bottom: 30px;
}
.feature-text {
  font-size: 14.5px;
  line-height: 2.1;
  color: #666;
  margin-bottom: 26px;
}
.feature-text + .feature-text { margin-top: -8px; }

/* 蓝色方块列表 */
.sq-list { margin-top: 8px; }
.sq-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  color: #444;
  line-height: 1.8;
  margin-bottom: 14px;
}
.sq-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .5em;
  width: 9px; height: 9px;
  background: #3f7fd9;
}
.sq-list.rich li b { color: #222; }
.sq-list.rich li { font-size: 14px; color: #555; }

/* ---------- 智能视力表设备示意 ---------- */
.feature-media { display: flex; justify-content: center; }
.vt-device { width: 300px; }
.vt-screen {
  background: #111;
  border-radius: 10px;
  padding: 26px 34px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: 0 16px 40px rgba(0,0,0,.15);
}
.vt-close {
  position: absolute; top: 10px; right: 16px;
  color: #666; font-size: 22px; line-height: 1;
}
.vt-title {
  color: #111;
  background: #fff;
  width: 100%;
  text-align: center;
  font-size: 26px;
  font-weight: 800;
  padding: 18px 0 6px;
  letter-spacing: 2px;
}
.vt-eye { background: #fff; width: 100%; text-align: center; padding: 6px 0 0; }
.vt-eye svg { width: 34px; height: 34px; }
.vt-cnt { background: #fff; width: 100%; text-align: center; font-size: 26px; font-weight: 700; color: #111; padding-bottom: 14px; }
.vt-btn {
  display: block;
  width: 100%;
  text-align: center;
  border: 1px solid #35b57c;
  color: #2ea872;
  font-size: 14px;
  padding: 9px 0;
  margin-bottom: 10px;
  background: #fff;
}
.vt-btn-solid { background: #35b57c; color: #fff; border-color: #35b57c; }
.vt-stand {
  width: 14px; height: 74px;
  background: linear-gradient(90deg, #15181d, #2c313a, #15181d);
  margin: 0 auto;
}
.vt-device::after {
  content: "";
  display: block;
  width: 150px; height: 10px;
  background: #1a1e24;
  border-radius: 50% 50% 4px 4px / 100% 100% 4px 4px;
  margin: 0 auto;
}

/* ---------- 验光仪设备示意 ---------- */
.rm-device {
  width: 340px; height: 320px;
  background: linear-gradient(160deg, #ffffff, #f0f0f2);
  border: 1px solid #ececf0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 16px 40px rgba(0,0,0,.08);
}
.rm-body { position: relative; width: 220px; height: 240px; }
.rm-head {
  position: absolute; top: 0; left: 30px;
  width: 130px; height: 70px;
  background: linear-gradient(180deg, #fdfdfd, #e8e8ec);
  border-radius: 26px 26px 10px 10px;
  box-shadow: inset 0 -4px 8px rgba(0,0,0,.06);
}
.rm-lens {
  position: absolute; top: 58px; left: 68px;
  width: 62px; height: 62px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #3a3f4a 0 22%, #14161c 23% 60%, #d94436 61% 68%, #eceef2 69%);
  box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
.rm-screen {
  position: absolute; top: 12px; right: 0;
  width: 64px; height: 46px;
  background: linear-gradient(180deg, #3c4654, #262d38);
  border-radius: 6px;
  transform: rotate(-6deg);
}
.rm-arm {
  position: absolute; top: 90px; left: 24px;
  width: 40px; height: 110px;
  background: linear-gradient(90deg, #f2f2f5, #dcdce2);
  border-radius: 16px;
}
.rm-base {
  position: absolute; bottom: 0; left: 0;
  width: 220px; height: 46px;
  background: linear-gradient(180deg, #f4f4f7, #d8d8de);
  border-radius: 12px 12px 18px 18px;
}

/* ---------- 管理平台界面示意 ---------- */
.dash-mock {
  width: 420px;
  max-width: 100%;
  height: 300px;
  display: flex;
  background: #f5f6f8;
  border: 1px solid #e8e8ee;
  box-shadow: 0 16px 40px rgba(0,0,0,.1);
  overflow: hidden;
}
.dash-side {
  flex: 0 0 64px;
  background: #2b3a4e;
  padding: 14px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.dash-logo { width: 28px; height: 28px; border-radius: 50%; background: #4d90d6; }
.dash-side span { width: 38px; height: 5px; border-radius: 3px; background: rgba(255,255,255,.28); }
.dash-side span:first-of-type { background: #4d90d6; }
.dash-main { flex: 1; padding: 12px 14px; display: flex; flex-direction: column; }
.dash-bar { height: 10px; width: 55%; background: #d9dee5; border-radius: 3px; margin-bottom: 12px; }
.dash-stat-row { display: flex; gap: 8px; margin-bottom: 14px; }
.dash-stat {
  flex: 1;
  height: 44px;
  border-radius: 4px;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  padding-left: 10px;
}
.s-orange { background: #f0662f; }
.s-cyan { background: #35b7d9; }
.s-blue { background: #4a5fc0; }
.dash-gauge-row { display: flex; gap: 10px; flex: 1; }
.dash-gauge {
  flex: 1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #555;
  background:
    radial-gradient(circle at 50% 50%, #fff 0 34%, transparent 35%),
    conic-gradient(#e05a5a 0 55%, #e8e8ee 55% 100%);
  aspect-ratio: 1;
  align-self: center;
  width: 62%;
}
.dash-gauge.g2 { background: radial-gradient(circle at 50% 50%, #fff 0 34%, transparent 35%), conic-gradient(#57c79a 0 8%, #e8e8ee 8% 100%); }
.dash-gauge.g3 { background: radial-gradient(circle at 50% 50%, #fff 0 34%, transparent 35%), conic-gradient(#5b8ff9 0 8%, #e8e8ee 8% 100%); }
.dash-foot { display: flex; gap: 10px; margin-top: 12px; }
.dash-foot span { flex: 1; height: 18px; background: #e4e8ee; border-radius: 3px; }

/* ---------- AI 数据图表示意 ---------- */
.chart-mock {
  width: 400px;
  max-width: 100%;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid #ececf2;
  box-shadow: 0 16px 40px rgba(0,0,0,.08);
}
.chart-title { text-align: center; font-size: 14px; font-weight: 600; color: #444; margin-bottom: 18px; }
.chart-title.sub { margin-top: 24px; }
.chart-bars {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  height: 130px;
  border-bottom: 1px solid #e2e2ea;
  padding: 0 6px;
}
.chart-bars span {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 100%;
}
.chart-bars i {
  width: 12px;
  height: var(--h);
  display: block;
}
.chart-bars .b1 { background: #5b8ff9; }
.chart-bars .b2 { background: #5ad8a6; }
.chart-line { width: 100%; height: 70px; display: block; margin-top: 6px; }

/* ---------- 护眼教室实景示意 ---------- */
.classroom-mock {
  position: relative;
  width: 420px;
  max-width: 100%;
  height: 300px;
  overflow: hidden;
  border: 1px solid #ececf0;
  box-shadow: 0 16px 40px rgba(0,0,0,.1);
  background: linear-gradient(180deg, #cfe6cd 0 34%, #f2efe4 34% 100%);
}
.cls-ceiling {
  position: absolute; top: 8%; left: 10%;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle, #fff 0 40%, #e8e2c8 41%);
  box-shadow: 0 0 18px rgba(255,255,240,.9);
}
.cls-window {
  position: absolute; top: 26%; left: 8%; right: 8%;
  height: 34%;
  background:
    repeating-linear-gradient(90deg, rgba(160,200,150,.55) 0 60px, rgba(255,255,255,.85) 60px 66px),
    linear-gradient(180deg, #bfe0c0, #dcead2);
  border: 3px solid #fff;
}
.cls-desks {
  position: absolute; bottom: 10%; left: 8%; right: 8%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.cls-desks span {
  height: 34px;
  background: linear-gradient(180deg, #e8d9a8, #c9b87e);
  border-radius: 4px 4px 8px 8px;
  box-shadow: 0 6px 10px rgba(0,0,0,.12);
}
.cls-tripod {
  position: absolute;
  bottom: 12%; left: 6%;
  width: 0; height: 0;
  border-left: 14px solid transparent;
  border-right: 14px solid transparent;
  border-bottom: 90px solid #3c4048;
  transform: rotate(-4deg);
  opacity: .9;
}

/* ---------- 子页面响应式 ---------- */
@media (max-width: 900px) {
  .page-banner { padding: 64px 24px; }
  .page-banner h1 { font-size: 30px; }
  .sys-grid { grid-template-columns: 1fr; max-width: 460px; }
  .feature-row { grid-template-columns: 1fr; gap: 44px; }
  .feature-row.reverse .feature-body { order: -1; }
  .feature-section { padding: 64px 0; }
  .feature-title { font-size: 24px; }
  .rm-device, .chart-mock, .classroom-mock { transform: scale(.92); }
}

/* ==========================================================
   招商加盟页
   ========================================================== */

/* 1. 招商 Banner */
.jm-hero {
  position: relative;
  margin-top: var(--nav-h);
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  overflow: hidden;
  background: #191c22;
}
.jm-hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 42% 60% at 68% 30%, rgba(255,255,255,.16), transparent 65%),
    radial-gradient(ellipse 55% 45% at 30% 85%, rgba(190,60,45,.22), transparent 70%),
    linear-gradient(150deg, #262b33 0%, #14171d 55%, #1c2028 100%);
}
.jm-hero-inner { position: relative; z-index: 1; padding: 40px 24px; max-width: 900px; }
.jm-hero h1 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 42px;
  text-shadow: 0 2px 14px rgba(0,0,0,.4);
}
.jm-hero p { font-size: 15px; line-height: 2; opacity: .92; letter-spacing: 1px; }
.jm-hero-phone {
  margin-top: 40px !important;
  font-size: 30px !important;
  font-weight: 600;
  font-family: "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  opacity: 1 !important;
}

/* 2. 全线共赢的商业模式 */
.jm-business {
  position: relative;
  padding: 90px 0 100px;
  color: #fff;
  overflow: hidden;
  background: #232830;
}
.jm-business-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 45% 40% at 78% 12%, rgba(255,255,255,.1), transparent 65%),
    radial-gradient(ellipse 50% 35% at 22% 90%, rgba(190,60,45,.28), transparent 70%),
    linear-gradient(160deg, #2c323c 0%, #20242c 60%, #262b34 100%);
}
.jm-business-inner { position: relative; z-index: 1; }
.dark-wm { color: rgba(255,255,255,.12); }
.v-divider.light { background: rgba(255,255,255,.6); }
.biz-desc {
  max-width: 680px;
  margin: 6px auto 64px;
  text-align: center;
  font-size: 14px;
  line-height: 2.1;
  color: rgba(255,255,255,.85);
}
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
  max-width: 940px;
  margin: 0 auto;
}
.biz-item { text-align: center; }
.biz-icon svg { width: 56px; height: 56px; }
.biz-item h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 22px 0 16px;
  letter-spacing: 1px;
}
.biz-item p { font-size: 13.5px; line-height: 1.9; color: rgba(255,255,255,.8); }

/* 3. 加盟条件与扶持 */
.jm-support {
  position: relative;
  padding: 90px 0 100px;
  color: #fff;
  overflow: hidden;
  background: #2a2b30;
}
.jm-support-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 40% 45% at 50% 50%, rgba(255,255,255,.09), transparent 70%),
    linear-gradient(150deg, #35363c 0%, #26272d 55%, #2e2f35 100%);
}
.jm-support-inner { position: relative; z-index: 1; }
.support-title {
  text-align: center;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 52px;
}
.support-title.mid { margin-top: 84px; }
.support-grid.four {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 44px 40px;
  max-width: 960px;
  margin: 0 auto;
}
.sup-item { text-align: center; }
.sup-item h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
}
.sup-item p { font-size: 13px; line-height: 1.85; color: rgba(255,255,255,.78); }

/* 4. 联系我们 */
.jm-contact { padding: 90px 0 110px; background: #232428; }
.contact-card {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border-radius: 6px;
  padding: 60px 72px 56px;
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
.contact-en {
  font-size: 34px;
  font-weight: 800;
  color: #1a1a1a;
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.contact-cn { font-size: 26px; font-weight: 600; color: #333; margin-bottom: 26px; }
.contact-desc { font-size: 14px; line-height: 2; color: #666; margin-bottom: 36px; }
.form-row {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 20px;
}
.form-row > label {
  flex: 0 0 72px;
  text-align: right;
  font-size: 14px;
  color: #555;
  line-height: 42px;
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row textarea {
  flex: 1;
  border: none;
  background: #eef1f4;
  padding: 10px 14px;
  font-size: 14px;
  color: #333;
  font-family: inherit;
  outline: none;
  transition: box-shadow .2s;
}
.form-row input:focus,
.form-row textarea:focus { box-shadow: 0 0 0 2px rgba(91,143,249,.4); }
.form-row textarea { resize: vertical; line-height: 1.8; }
.captcha-row { flex: 1; display: flex; gap: 12px; }
.captcha-row input {
  flex: 1;
  border: none;
  background: #eef1f4;
  padding: 10px 14px;
  font-size: 14px;
  outline: none;
}
.captcha-img {
  flex: 0 0 96px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Comic Sans MS", "Marker Felt", cursive;
  font-size: 22px;
  font-weight: 700;
  font-style: italic;
  color: #3a9d4e;
  letter-spacing: 3px;
  background:
    repeating-linear-gradient(45deg, rgba(120,160,120,.15) 0 3px, transparent 3px 6px),
    #eef7ef;
  border: 1px solid #dce8de;
  cursor: pointer;
  user-select: none;
}
.form-actions { display: flex; justify-content: flex-end; margin-top: 8px; }
.submit-btn {
  border: none;
  background: #5b8ff9;
  color: #fff;
  font-size: 15px;
  padding: 11px 44px;
  border-radius: 22px;
  cursor: pointer;
  transition: background .25s;
}
.submit-btn:hover { background: #4a7fe8; }

/* 招商页响应式 */
@media (max-width: 900px) {
  .jm-hero { min-height: 440px; }
  .jm-hero h1 { font-size: 26px; letter-spacing: 1px; }
  .jm-hero-phone { font-size: 24px !important; }
  .biz-grid { grid-template-columns: 1fr; gap: 40px; }
  .support-grid.four { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .contact-card { padding: 40px 28px; }
  .form-row { flex-direction: column; gap: 8px; }
  .form-row > label { text-align: left; line-height: 1.4; }
}

/* ==========================================================
   关于我们页
   ========================================================== */

/* 1. 公司简介 Hero */
.ab-hero {
  position: relative;
  margin-top: var(--nav-h);
  padding: 130px 0 110px;
  color: #fff;
  overflow: hidden;
  background: #26313e;
}
.ab-hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(115deg, transparent 40%, rgba(160,200,235,.14) 40.3% 52%, transparent 52.3%),
    linear-gradient(65deg, transparent 55%, rgba(160,200,235,.1) 55.3% 70%, transparent 70.3%),
    radial-gradient(ellipse 60% 50% at 70% 20%, rgba(140,190,235,.22), transparent 65%),
    linear-gradient(150deg, #33465c 0%, #26333f 55%, #1e2934 100%);
}
.ab-hero-inner { position: relative; z-index: 1; }
.ab-watermark {
  display: block;
  font-size: 84px;
  font-weight: 800;
  color: rgba(255,255,255,.14);
  line-height: 1;
  margin-bottom: -34px;
  user-select: none;
}
.ab-hero h1 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 30px;
}
.ab-hero-text { max-width: 720px; }
.ab-hero-text p {
  font-size: 14px;
  line-height: 2.15;
  color: rgba(255,255,255,.92);
  margin-bottom: 8px;
}

/* 2. 愿景 使命 价值观 */
.ab-culture { background: #fff; padding: 90px 0; }
.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
  max-width: 960px;
}
.culture-icon { color: #333; }
.culture-icon svg { width: 52px; height: 52px; }
.culture-item h3 {
  font-size: 26px;
  font-weight: 600;
  color: #8f6fd0;
  margin: 24px 0 30px;
}
.culture-item p {
  font-size: 14px;
  line-height: 2;
  color: #666;
  max-width: 240px;
}

/* 3. 发展历程 */
.ab-history { padding: 90px 0 100px; }
.alt-bg { background: #f6f6f6; }
.history-title {
  text-align: center;
  font-size: 30px;
  font-weight: 700;
  color: #1c1c1c;
  letter-spacing: 2px;
}
.head-line.blue { background: #5b8ff9; margin-top: 18px; }
.timeline {
  max-width: 860px;
  margin: 56px auto 0;
  border-left: 2px solid #e2e2ea;
  padding-left: 40px;
}
.tl-item {
  position: relative;
  margin-bottom: 38px;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -47px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #8f6fd0;
  box-shadow: 0 0 0 4px #fff;
}
.tl-item h3 {
  font-size: 19px;
  font-weight: 700;
  color: #222;
  margin-bottom: 12px;
}
.tl-item p {
  font-size: 14.5px;
  line-height: 2.1;
  color: #555;
  margin-bottom: 6px;
}

/* 4. 荣誉资质 */
.ab-honors { background: #fff; padding-bottom: 110px; }
.honor-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  max-width: 1020px;
  margin: 56px auto 0;
}
.honor-cert {
  position: relative;
  margin: 0;
  aspect-ratio: 1.42;
  background: linear-gradient(160deg, #fdfdfb, #f3f2ee);
  border: 1px solid #e6e4dc;
  box-shadow: 0 10px 26px rgba(0,0,0,.08);
  overflow: hidden;
}
.honor-cert img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s;
}
.honor-cert:hover img { transform: scale(1.05); }

/* 5. 联系我们 */
.ab-contact { padding: 90px 0 110px; background: #f6f6f6; }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  align-items: stretch;
  max-width: 1020px;
}
.contact-info {
  background: #fff;
  border-left: 4px solid #8f6fd0;
  padding: 56px 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.contact-info h2 {
  font-size: 26px;
  font-weight: 700;
  color: #1c1c1c;
  margin-bottom: 10px;
}
.contact-sub { font-size: 13.5px; color: #999; margin-bottom: 34px; }
.contact-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 14px;
  color: #555;
  margin-bottom: 22px;
}
.contact-list svg {
  width: 18px;
  height: 18px;
  fill: #8f6fd0;
  flex: 0 0 18px;
}
.map-img {
  overflow: hidden;
  border: 1px solid #e2e2dc;
  min-height: 380px;
}
.map-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 关于页响应式 */
@media (max-width: 900px) {
  .ab-hero { padding: 80px 0 70px; }
  .ab-watermark { font-size: 52px; margin-bottom: -20px; }
  .ab-hero h1 { font-size: 28px; }
  .culture-grid { grid-template-columns: 1fr; gap: 44px; }
  .culture-item p { max-width: none; }
  .honor-strip { grid-template-columns: 1fr 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .timeline { padding-left: 26px; }
  .tl-item::before { left: -33px; }
}