/* ===== 上鸣科技 · 企业官网全局样式 ===== */
:root {
  --c-brand: #1f6feb;          /* 主色：科技蓝 */
  --c-brand-dark: #0b4fae;
  --c-accent: #58a6ff;
  --c-ink: #0f172a;            /* 主文字 */
  --c-body: #475569;           /* 正文 */
  --c-muted: #94a3b8;
  --c-bg: #ffffff;
  --c-bg-soft: #f6f9ff;
  --c-line: #e5ecf7;
  --c-white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 60, 140, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 60, 140, 0.14);
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== 顶部导航 ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--c-line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 21px;
  letter-spacing: 0.5px;
}
.logo .logo-mark {
  width: 36px; height: 36px;
  display: block;
  flex-shrink: 0;
}
.logo small { font-weight: 500; color: var(--c-muted); font-size: 12px; display: block; line-height: 1.1; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 16px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink);
  transition: all .2s;
  cursor: pointer;
}
.nav-links > li > a:hover,
.nav-links > li > a.active { color: var(--c-brand); background: var(--c-bg-soft); }
.caret { font-size: 11px; transition: transform .2s; }
.nav-links li.has-drop:hover .caret { transform: rotate(180deg); }

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 230px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all .22s;
}
.nav-links li.has-drop:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--c-body);
  transition: all .18s;
}
.dropdown a:hover { background: var(--c-bg-soft); color: var(--c-brand); }
.dropdown a .drop-tag { font-size: 11px; color: var(--c-muted); margin-left: 4px; }

.nav-cta {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 10px;
  background: var(--c-brand);
  color: #fff !important;
  font-weight: 600;
  font-size: 14px;
  transition: all .2s;
}
.nav-cta:hover { background: var(--c-brand-dark); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--c-ink); border-radius: 2px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(88, 166, 255, 0.18), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(31, 111, 235, 0.14), transparent 55%),
    linear-gradient(180deg, #f6f9ff 0%, #ffffff 100%);
  padding: 88px 0 96px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--c-line);
  color: var(--c-brand);
  font-weight: 600;
  font-size: 13px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: 48px;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--c-brand), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .sub {
  font-size: 17px;
  color: var(--c-body);
  max-width: 520px;
  margin-bottom: 14px;
}
.hero .sub-en {
  font-size: 13px;
  color: var(--c-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  transition: all .2s;
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--c-brand); color: #fff; box-shadow: 0 8px 20px rgba(31,111,235,.28); }
.btn-primary:hover { background: var(--c-brand-dark); transform: translateY(-2px); }
.btn-ghost { background: #fff; color: var(--c-ink); border: 1px solid var(--c-line); }
.btn-ghost:hover { border-color: var(--c-brand); color: var(--c-brand); }

.hero-stats {
  display: flex;
  gap: 0;
  margin-top: 44px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.hero-stats .stat {
  flex: 1;
  padding: 22px 26px;
  text-align: center;
}
.hero-stats .stat + .stat { border-left: 1px solid var(--c-line); }
.hero-stats .num { font-size: 30px; font-weight: 800; color: var(--c-brand); }
.hero-stats .lbl { font-size: 13px; color: var(--c-muted); margin-top: 4px; }

.hero-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(160deg, #0b1f3f 0%, #123a6e 100%);
  padding: 34px;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.hero-visual .tag { color: #7fb5ff; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 14px; }
.hero-visual h3 { color: #fff; font-size: 26px; margin-bottom: 24px; }
.cloud-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  color: #e6efff;
  font-size: 14px;
}
.cloud-item .dot { width: 10px; height: 10px; border-radius: 50%; background: #58a6ff; flex-shrink: 0; }
.cloud-item strong { color: #fff; }

/* ===== 通用章节 ===== */
.section { padding: 88px 0; }
.section.alt { background: var(--c-bg-soft); }
.sec-head { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.sec-head .en {
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-brand);
  font-weight: 700;
  margin-bottom: 12px;
}
.sec-head h2 { font-size: 36px; font-weight: 800; margin-bottom: 14px; }
.sec-head p { color: var(--c-body); font-size: 16px; }

/* ===== 卡片网格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }

.card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }

/* 应用场景卡片：顶部蓝线 + 编号（无图标） */
.scene-card { padding-top: 26px; }
.scene-card::before {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--c-brand);
  margin-bottom: 16px;
}
.scene-num {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-brand);
  margin-bottom: 8px;
}
.scene-card h3 { margin-top: 2px; }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--c-body); font-size: 14.5px; }

/* ===== 品牌介绍 ===== */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.intro-text p { color: var(--c-body); font-size: 15.5px; margin-bottom: 16px; text-align: justify; }
.intro-points { display: flex; flex-direction: column; gap: 14px; margin-top: 24px; }
.intro-point {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px 20px 18px 22px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-brand);
  border-radius: 12px;
}
.intro-point strong { display: block; font-size: 15px; margin-bottom: 3px; }
.intro-point span { font-size: 13.5px; color: var(--c-body); }

/* ===== 新闻 ===== */
.news-item {
  display: flex;
  gap: 20px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  margin-bottom: 16px;
  transition: all .2s;
}
.news-item:hover { box-shadow: var(--shadow); border-color: transparent; }
.news-date {
  flex-shrink: 0;
  width: 74px; height: 74px;
  border-radius: 12px;
  background: var(--c-bg-soft);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--c-brand);
}
.news-date .d { font-size: 26px; font-weight: 800; line-height: 1; }
.news-date .m { font-size: 12px; }
.news-item h4 { font-size: 16px; margin-bottom: 8px; font-weight: 700; }
.news-item p { font-size: 14px; color: var(--c-body); }

/* ===== 页脚 ===== */
.footer {
  background: #0b1f3f;
  color: #c7d6f2;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.footer .f-brand { color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 14px; display: flex; align-items: center; gap: 10px; }
.footer .f-brand .f-logo {
  width: 30px; height: 30px;
  display: block;
  filter: brightness(0) invert(1);
}
.footer p { font-size: 13.5px; line-height: 1.8; color: #9fb4d8; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { font-size: 13.5px; color: #9fb4d8; transition: color .2s; }
.footer ul a:hover { color: #fff; }
.footer .contact-line { display: flex; gap: 10px; margin-bottom: 12px; font-size: 13.5px; align-items: flex-start; }
.footer .contact-line .ico {
  flex-shrink: 0;
  min-width: 32px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--c-accent);
  padding-top: 1px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: #8ba0c4;
}
.footer-bottom a { color: #8ba0c4; text-decoration: none; transition: color .2s; }
.footer-bottom a:hover { color: #fff; }
.footer .contact-line a { color: #9fb4d8; text-decoration: none; transition: color .2s; }
.footer .contact-line a:hover { color: #fff; }

/* ===== 图片卡片 ===== */
.img-card {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--c-line);
  transition: all .25s;
}
.img-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.img-card .img-wrap { height: 210px; overflow: hidden; }
.img-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.img-card:hover .img-wrap img { transform: scale(1.06); }
.img-card .img-body { padding: 24px 26px; }
.img-card .img-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 9px; }
.img-card .img-body p { color: var(--c-body); font-size: 14px; }

/* Hero 图片 */
.hero-img { border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-lg); }
.hero-img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 内页 Hero 顶部通栏图 */
.page-hero-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  margin-top: 28px;
}

/* ===== 内页 Hero ===== */
.page-hero {
  background:
    radial-gradient(1000px 500px at 80% -20%, rgba(88,166,255,.2), transparent 60%),
    linear-gradient(180deg, #f6f9ff, #fff);
  padding: 72px 0 60px;
  border-bottom: 1px solid var(--c-line);
}
.breadcrumb { font-size: 13px; color: var(--c-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--c-brand); }
.breadcrumb span { margin: 0 8px; color: var(--c-line); }
.page-hero h1 { font-size: 40px; font-weight: 800; margin-bottom: 14px; }
.page-hero h1 .page-hero-sub { display: block; font-size: 22px; font-weight: 600; color: var(--c-muted); margin-top: 6px; }
.page-hero .lead { font-size: 16.5px; color: var(--c-body); max-width: 760px; }

/* ===== 解决方案列表页 ===== */
.solution-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 16px;
  overflow: hidden;
  transition: all .25s;
}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.solution-card .thumb {
  height: 210px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(150deg, #0b1f3f, #1f6feb);
}
.solution-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.solution-card:hover .thumb img { transform: scale(1.06); }
.solution-card .thumb.moniaa { background: linear-gradient(150deg, #123a6e, #58a6ff); }
.solution-card .thumb.pili { background: linear-gradient(150deg, #0b4fae, #7fb5ff); }
.solution-card .thumb.smb { background: linear-gradient(150deg, #1f6feb, #58a6ff); }
.solution-card .body { padding: 26px 28px; flex: 1; display: flex; flex-direction: column; }
.solution-card h3 { font-size: 20px; margin-bottom: 10px; }
.solution-card p { color: var(--c-body); font-size: 14.5px; flex: 1; }
.solution-card .more {
  margin-top: 18px;
  color: var(--c-brand);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex; align-items: center; gap: 6px;
}
.solution-card .more:hover { gap: 10px; }
.solution-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.solution-card .tags span {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--c-bg-soft);
  color: var(--c-brand);
  font-weight: 500;
}

/* ===== 方案详情页 ===== */
.detail-block { margin-bottom: 64px; }
.detail-block h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 22px;
  padding-left: 16px;
  border-left: 4px solid var(--c-brand);
}
.detail-block h3 { font-size: 18px; font-weight: 700; margin: 20px 0 10px; }
.detail-block p { color: var(--c-body); font-size: 15px; margin-bottom: 14px; text-align: justify; }

.challenge-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 8px; }
.challenge {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 24px;
}
.challenge .c-title { font-weight: 700; color: var(--c-brand); margin-bottom: 8px; font-size: 15px; }
.challenge p { font-size: 13.5px; color: var(--c-body); margin: 0; }

.arch-list { display: flex; flex-direction: column; gap: 16px; }
.arch-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  padding: 22px 24px;
}
.arch-item .a-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--c-ink);
  margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.arch-item ul { margin-left: 18px; }
.arch-item li {
  font-size: 14px;
  color: var(--c-body);
  margin-bottom: 8px;
  list-style: disc;
}
.arch-item li strong { color: var(--c-ink); }

.result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.result {
  background: linear-gradient(160deg, #f6f9ff, #fff);
  border: 1px solid var(--c-line);
  border-radius: 14px;
  padding: 22px 26px;
}
.result .r-icon { display: none; }
.result h4 { font-size: 17px; margin-bottom: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--c-line); }
.result p { font-size: 14.5px; color: var(--c-body); margin: 0; line-height: 1.85; }

/* 架构概览：左图右文 */
.arch-overview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.arch-overview .arch-image {
  position: sticky;
  top: 92px;
  border: 1px solid var(--c-line);
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}
.arch-overview .arch-image img {
  width: 100%;
  height: auto;
  display: block;
}
.arch-overview .arch-image .img-placeholder {
  padding: 18px;
  background: repeating-linear-gradient(
    45deg,
    #f6f9ff,
    #f6f9ff 12px,
    #eaf2ff 12px,
    #eaf2ff 24px
  );
  text-align: center;
  color: var(--c-muted);
  font-size: 13px;
}
.arch-overview .arch-image .img-caption {
  padding: 12px 16px;
  border-top: 1px solid var(--c-line);
  background: #fafbff;
  font-size: 13px;
  color: var(--c-body);
  text-align: center;
}
.arch-overview .arch-text h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--c-brand);
  color: var(--c-ink);
}
.arch-overview .arch-text h3 + p { margin-bottom: 24px; }

@media (max-width: 960px) {
  .arch-overview { grid-template-columns: 1fr; }
  .arch-overview .arch-image { position: static; }
}
.result .r-icon { font-size: 28px; margin-bottom: 14px; }
.result h4 { font-size: 16px; margin-bottom: 10px; }
.result p { font-size: 13.5px; color: var(--c-body); margin: 0; }

.callout {
  background: var(--c-bg-soft);
  border-left: 4px solid var(--c-brand);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 20px 0;
  color: var(--c-body);
  font-size: 14.5px;
}

/* ===== CTA 区域 ===== */
.cta {
  background: linear-gradient(135deg, var(--c-brand), var(--c-brand-dark));
  border-radius: 20px;
  padding: 56px;
  text-align: center;
  color: #fff;
  margin: 20px 0 0;
}
.cta h2 { font-size: 30px; margin-bottom: 14px; }
.cta p { color: #dbe7ff; margin-bottom: 28px; font-size: 15.5px; }
.cta .btn { background: #fff; color: var(--c-brand); }
.cta .btn:hover { transform: translateY(-2px); }

/* ===== 联系我们（表单区） ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 56px;
  align-items: center;
  background: linear-gradient(135deg, var(--c-brand), var(--c-brand-dark));
  border-radius: 20px;
  padding: 56px;
  color: #fff;
}
.contact-info h2 { font-size: 30px; margin-bottom: 14px; color: #fff; line-height: 1.35; }
.contact-info > p { color: #dbe7ff; margin-bottom: 28px; font-size: 15.5px; }
.contact-info-list .ci-line {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 14px;
  align-items: flex-start;
}
.ci-line .ci-label {
  flex-shrink: 0;
  min-width: 32px;
  font-size: 12px;
  letter-spacing: 1px;
  color: #9fd0ff;
  padding-top: 2px;
}
.ci-line a { color: #fff; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.35); transition: border-color .2s; }
.ci-line a:hover { border-bottom-color: #fff; }
.contact-form-card {
  background: #fff;
  border-radius: 14px;
  padding: 32px;
  box-shadow: var(--shadow-lg);
}
.contact-form-card h3 { font-size: 20px; margin-bottom: 20px; color: var(--c-ink); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13px; color: var(--c-body); margin-bottom: 6px; font-weight: 500; }
.form-field input, .form-field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--c-line);
  border-radius: 10px;
  font-size: 14px;
  font-family: inherit;
  color: var(--c-ink);
  background: var(--c-bg-soft);
  transition: border-color .2s, background .2s;
}
.form-field input:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: #fff;
}
.form-field input::placeholder, .form-field textarea::placeholder { color: var(--c-muted); }
.form-field textarea { resize: vertical; }
.btn-submit {
  width: 100%;
  border: none;
  cursor: pointer;
  padding: 13px 0;
  border-radius: 10px;
  background: var(--c-brand);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  transition: background .2s, transform .2s;
}
.btn-submit:hover { background: var(--c-brand-dark); transform: translateY(-2px); }
.btn-submit:disabled { background: #2ea043; cursor: default; transform: none; }
.form-tip { font-size: 12px; color: var(--c-muted); margin-top: 12px; text-align: center; line-height: 1.6; }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero-grid, .intro-grid, .grid-3, .grid-4,
  .challenge-list, .result-grid, .contact-grid { grid-template-columns: 1fr; }
  .contact-grid { gap: 32px; padding: 36px 24px; }
  .form-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links > li > a { padding: 14px 8px; }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; padding: 0 0 0 16px; }
  .nav-toggle { display: flex; }
  .hero-stats { flex-direction: column; }
  .hero-stats .stat + .stat { border-left: none; border-top: 1px solid var(--c-line); }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { padding: 56px 0 64px; }
  .cta { padding: 36px 24px; }
}

/* ===== SMB 页面：服务分层表格（其余布局复用 Moniaa 样式） ===== */
.challenge-list.two-col { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 960px) {
  .challenge-list.two-col { grid-template-columns: 1fr; }
}
.tier-wrap {
  background: #fff;
  border-radius: 14px;
  border: 1px solid var(--c-line);
  overflow: hidden;
}
.tier-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  font-size: 14.5px;
}
.tier-table thead th {
  background: var(--c-brand);
  color: #fff;
  font-weight: 600;
  padding: 16px 24px;
  text-align: left;
  font-size: 14.5px;
  letter-spacing: 0.5px;
}
.tier-table tbody td {
  padding: 18px 24px;
  border-top: 1px solid var(--c-line);
  color: var(--c-body);
}
.tier-table tbody tr:nth-child(odd) td { background: #fafbff; }
.tier-table tbody td:first-child { font-weight: 700; color: var(--c-ink); }

@media (max-width: 560px) {
  .tier-table thead th, .tier-table tbody td { padding: 12px 14px; font-size: 13px; }
}