/* ============================================================
   鑫数字科技官网样式
   设计基调：深蓝主体 + 青蓝点缀 + 白色内容区
   ============================================================ */

:root {
  --navy: #0B2B4E;
  --navy-2: #123A66;
  --navy-deep: #071C33;
  --accent: #2AA7F0;
  --mint: #17C4B8;
  --ink: #0F1B2D;
  --ink-2: #42566E;
  --ink-3: #6B7D93;
  --line: #E3EAF3;
  --soft: #F5F8FD;
  --soft-2: #EDF3FB;
  --white: #FFFFFF;
  --warn: #B4451F;
  --ok: #13795B;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(11, 43, 78, .06), 0 4px 14px rgba(11, 43, 78, .05);
  --shadow-md: 0 10px 30px rgba(11, 43, 78, .10);
  --shell: 1200px;
  --header-h: 72px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

a { color: var(--navy-2); text-decoration: none; }
a:hover { color: var(--accent); }

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.32;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--ink);
}

p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

:focus-visible {
  outline: 3px solid rgba(42, 167, 240, .55);
  outline-offset: 2px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  white-space: nowrap;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #1E8FD6);
  box-shadow: 0 8px 20px rgba(42, 167, 240, .28);
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 26px rgba(42, 167, 240, .34);
}

.btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, .38);
  background: rgba(255, 255, 255, .06);
}
.btn-outline:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, .7);
  background: rgba(255, 255, 255, .13);
}

.btn-soft {
  color: var(--navy);
  background: var(--soft-2);
  border-color: var(--line);
}
.btn-soft:hover { color: var(--navy); background: #E2ECF9; }

.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 15px 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .2s ease;
}
.site-header.is-scrolled { box-shadow: 0 4px 20px rgba(11, 43, 78, .08); }

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}
.brand-mark { display: inline-flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-size: 18px;
  letter-spacing: .04em;
  color: var(--navy);
  font-weight: 800;
}
.brand-text small {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: .16em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1 1 auto;
  justify-content: flex-end;
}
.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 26px;
}
.primary-nav a {
  font-size: 15px;
  color: var(--ink-2);
  padding: 6px 0;
  position: relative;
  font-weight: 500;
}
.primary-nav a:hover { color: var(--navy); }
.primary-nav a.is-active { color: var(--navy); font-weight: 700; }
.primary-nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--mint));
}

.nav-actions { display: flex; align-items: center; gap: 16px; }

/* 导航主按钮：渐变 + 光带扫过 + 箭头位移 */
.nav-cta {
  position: relative;
  overflow: hidden;
  padding: 9px 16px 9px 18px;
  border-radius: 999px;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: .02em;
  background: linear-gradient(120deg, #2AA7F0 0%, #1E9BDD 45%, #17C4B8 100%);
  box-shadow: 0 5px 14px rgba(42, 167, 240, .3), inset 0 1px 0 rgba(255, 255, 255, .28);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}
.nav-cta::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -60%;
  width: 45%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .42), transparent);
  transform: skewX(-18deg);
  transition: left .55s ease;
  pointer-events: none;
}
.nav-cta svg {
  width: 13px;
  height: 13px;
  transition: transform .2s ease;
}
.nav-cta:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(42, 167, 240, .4), inset 0 1px 0 rgba(255, 255, 255, .32);
  filter: saturate(1.08);
}
.nav-cta:hover::after { left: 120%; }
.nav-cta:hover svg { transform: translateX(3px); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- 首页首屏 ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(900px 420px at 82% -10%, rgba(23, 196, 184, .28), transparent 60%),
    radial-gradient(760px 380px at 8% 8%, rgba(42, 167, 240, .30), transparent 62%),
    linear-gradient(158deg, var(--navy-deep) 0%, var(--navy) 48%, var(--navy-2) 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 56px;
  align-items: center;
  padding: 84px 24px 92px;
  max-width: var(--shell);
  margin: 0 auto;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .08em;
  color: #BFE6F6;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(23, 196, 184, .18);
}

.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.3rem);
  line-height: 1.22;
  color: #fff;
  letter-spacing: -.02em;
  margin-bottom: 20px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, #6FD3F5, #37E0C8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(231, 240, 250, .88);
  max-width: 34em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.chips li {
  font-size: 13.5px;
  color: rgba(226, 238, 250, .86);
  padding: 5px 13px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .12);
}

/* 首屏流程示意 */
.flow-card {
  background: rgba(255, 255, 255, .97);
  border-radius: var(--radius-lg);
  padding: 26px 26px 22px;
  box-shadow: 0 24px 60px rgba(3, 15, 30, .38);
  color: var(--ink);
}
.flow-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}
.flow-card-head strong { font-size: 15px; color: var(--navy); }
.flow-card-head span {
  font-size: 12px;
  color: var(--ink-3);
  background: var(--soft);
  border: 1px solid var(--line);
  padding: 2px 10px;
  border-radius: 999px;
}

.flow-list { display: flex; flex-direction: column; gap: 4px; }
.flow-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--soft);
  position: relative;
}
.flow-step + .flow-step::before {
  content: "";
  position: absolute;
  left: 27px;
  top: -10px;
  height: 10px;
  width: 2px;
  background: linear-gradient(180deg, rgba(42, 167, 240, .18), rgba(42, 167, 240, .65));
}
.flow-step .num {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--navy-2));
}
.flow-step .txt { display: flex; flex-direction: column; line-height: 1.35; }
.flow-step .txt strong { font-size: 14px; color: var(--ink); }
.flow-step .txt small { font-size: 12px; color: var(--ink-3); }

/* ---------------- 通用区块 ---------------- */
.section { padding: 78px 0; }
.section--soft { background: var(--soft); }
.section--tight { padding: 56px 0; }

.section-head { max-width: 760px; margin-bottom: 42px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }

.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); margin-bottom: 14px; }
.section-head p { font-size: 16px; color: var(--ink-2); }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #CFE0F2;
}
.card h3 { font-size: 17px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.8; }

.icon-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(42, 167, 240, .14), rgba(23, 196, 184, .14));
  color: var(--navy-2);
}
.icon-box svg { width: 22px; height: 22px; }

/* 挑战列表 */
.challenge {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.challenge:last-child { border-bottom: 0; }
.challenge .dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 11px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--mint));
}
.challenge strong { display: block; font-size: 15.5px; margin-bottom: 4px; }
.challenge p { font-size: 14px; color: var(--ink-2); }

/* 五步流程 */
.steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  counter-reset: step;
}
.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 18px;
  box-shadow: var(--shadow-sm);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--navy-2), var(--accent));
  margin-bottom: 12px;
}
.step h3 { font-size: 15px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }

/* 场景卡片 */
.scenario {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 14px;
  height: 100%;
}
.scenario .tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy-2);
  background: var(--soft-2);
  padding: 3px 10px;
  border-radius: 6px;
}
.scenario h3 { font-size: 17px; }
.scenario dl { margin: 0; display: grid; gap: 10px; }
.scenario dl div { display: grid; grid-template-columns: 56px 1fr; gap: 10px; align-items: start; }
.scenario dt { font-size: 13px; color: var(--ink-3); }
.scenario dd { margin: 0; font-size: 14px; color: var(--ink-2); line-height: 1.7; }

/* ---------------- 价格 ---------------- */
.price-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.tier {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 22px 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.tier:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.tier--featured {
  border-color: transparent;
  background: linear-gradient(165deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff;
  box-shadow: 0 18px 40px rgba(11, 43, 78, .22);
}
.tier--featured h3,
.tier--featured .tier-price strong { color: #fff; }
.tier--featured .tier-tagline,
.tier--featured .tier-note { color: rgba(226, 238, 250, .78); }
.tier--featured .tier-features li { color: rgba(238, 245, 252, .92); border-color: rgba(255, 255, 255, .12); }
.tier--featured .tier-features svg { color: #37E0C8; }

.tier-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  font-size: 12px;
  font-weight: 700;
  color: var(--navy-deep);
  background: linear-gradient(135deg, #6FD3F5, #37E0C8);
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: .04em;
}

.tier h3 { font-size: 19px; margin-bottom: 4px; }
.tier-tagline { font-size: 13px; color: var(--ink-3); margin-bottom: 18px; }

.tier-price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-bottom: 18px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.tier--featured .tier-price { border-color: rgba(255, 255, 255, .14); }
.tier-price .cur { font-size: 15px; color: var(--ink-3); }
.tier--featured .tier-price .cur { color: rgba(226, 238, 250, .7); }
.tier-price strong {
  font-size: 30px;
  line-height: 1;
  color: var(--navy);
  letter-spacing: -.02em;
  font-weight: 800;
}
.tier-price .unit { font-size: 13px; color: var(--ink-3); }
.tier--featured .tier-price .unit { color: rgba(226, 238, 250, .7); }

.tier-features { display: grid; gap: 10px; margin-bottom: 22px; flex: 1 1 auto; }
.tier-features li {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.6;
}
.tier-features svg {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  color: var(--accent);
}

.tier-note {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 14px;
  text-align: center;
}

/* 对比表 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}
.compare {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 14px;
}
.compare th,
.compare td {
  padding: 15px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.compare thead th {
  background: var(--soft);
  font-size: 13.5px;
  color: var(--navy);
  font-weight: 700;
  white-space: nowrap;
  position: sticky;
  top: 0;
}
.compare tbody th {
  font-weight: 600;
  color: var(--ink);
  background: #FBFCFE;
  white-space: nowrap;
  position: sticky;
  left: 0;
  z-index: 1;
}
.compare td { color: var(--ink-2); }
.compare tbody tr:last-child th,
.compare tbody tr:last-child td { border-bottom: 0; }
.compare .col-featured { background: rgba(42, 167, 240, .05); }

/* ---------------- FAQ ---------------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 4px 20px;
  box-shadow: var(--shadow-sm);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
  padding: 15px 30px 15px 0;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 4px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-3);
  border-bottom: 2px solid var(--ink-3);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq details p {
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 0 0 18px;
  line-height: 1.85;
}

/* ---------------- CTA 横幅 ---------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 46px 44px;
  color: #fff;
  background:
    radial-gradient(600px 240px at 88% 0%, rgba(23, 196, 184, .3), transparent 65%),
    linear-gradient(150deg, var(--navy) 0%, var(--navy-2) 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.35rem, 2.3vw, 1.85rem); color: #fff; margin-bottom: 8px; }
.cta-band p { font-size: 15px; color: rgba(231, 240, 250, .85); }
.cta-band .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---------------- 内页头部 ---------------- */
.page-hero {
  padding: 64px 0 58px;
  background:
    radial-gradient(700px 300px at 88% -20%, rgba(23, 196, 184, .18), transparent 62%),
    linear-gradient(150deg, var(--navy-deep) 0%, var(--navy) 60%, var(--navy-2) 100%);
  color: #fff;
}
.page-hero h1 { color: #fff; font-size: clamp(1.7rem, 3.2vw, 2.5rem); margin-bottom: 14px; }
.page-hero p { color: rgba(231, 240, 250, .86); font-size: 16px; max-width: 46em; }

/* ---------------- 正文排版 ---------------- */
.prose { max-width: 820px; }
.prose h2 { font-size: 20px; margin: 34px 0 12px; }
.prose h3 { font-size: 16.5px; margin: 26px 0 10px; }
.prose p { font-size: 15px; color: var(--ink-2); margin-bottom: 12px; line-height: 1.9; }
.prose ul { margin: 0 0 16px; padding-left: 0; display: grid; gap: 8px; }
.prose ul li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.85;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .65;
}
.prose .meta { font-size: 13.5px; color: var(--ink-3); }

/* ---------------- 联系与表单 ---------------- */
.contact-layout {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 40px;
  align-items: start;
}

.info-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
}
.info-card h3 { font-size: 15px; color: var(--ink-3); font-weight: 600; margin-bottom: 8px; letter-spacing: .04em; }
.info-card .big { font-size: 24px; font-weight: 800; color: var(--navy); letter-spacing: .02em; }
.info-card .big a { color: var(--navy); }
.info-card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.8; }
.copy-btn {
  margin-top: 10px;
  font-size: 13px;
  color: var(--navy-2);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
}
.copy-btn:hover { background: var(--soft-2); }

.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.form-card h2 { font-size: 20px; margin-bottom: 6px; }
.form-note { font-size: 13.5px; color: var(--ink-3); margin-bottom: 24px; }

.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field label .req { color: var(--warn); margin-left: 2px; }
.field .hint { font-size: 12.5px; color: var(--ink-3); }

.input,
.select,
.textarea {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #D5E0EE;
  border-radius: 10px;
  padding: 12px 14px;
  transition: border-color .16s ease, box-shadow .16s ease;
}
.input::placeholder, .textarea::placeholder { color: #9AABBF; }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42, 167, 240, .16);
}
.textarea { min-height: 128px; resize: vertical; }
.input.has-error, .select.has-error, .textarea.has-error { border-color: #DC7A57; }

.field-error { font-size: 13px; color: var(--warn); }

.checkbox {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.7;
  cursor: pointer;
}
.checkbox input { margin-top: 4px; width: 16px; height: 16px; accent-color: var(--navy-2); flex: 0 0 auto; }
.checkbox a { text-decoration: underline; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.alert {
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 14px;
  margin-bottom: 18px;
  line-height: 1.7;
}
.alert-success { background: #E9F7F2; border: 1px solid #B7E3D4; color: var(--ok); }
.alert-error { background: #FDF1EC; border: 1px solid #F3CFC1; color: var(--warn); }

.form-actions { margin-top: 22px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-actions .hint { font-size: 13px; color: var(--ink-3); }

/* ---------------- 页脚 ---------------- */
.site-footer {
  margin-top: 0;
  background: var(--navy-deep);
  color: rgba(219, 231, 244, .78);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .7fr .7fr 1.1fr;
  gap: 36px;
  padding-bottom: 40px;
}
.brand--footer .brand-text strong { color: #fff; }
.brand--footer .brand-text small { color: rgba(219, 231, 244, .55); }
.footer-desc {
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(219, 231, 244, .68);
  margin: 16px 0 14px;
  max-width: 30em;
}
.footer-phone { font-size: 17px; font-weight: 700; color: #fff; letter-spacing: .02em; }
.footer-col h2 {
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(219, 231, 244, .5);
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-col ul { display: grid; gap: 10px; }
.footer-col li { font-size: 14px; }
.footer-col a { color: rgba(219, 231, 244, .78); }
.footer-col a:hover { color: #fff; }
.footer-contact li { line-height: 1.8; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding-top: 20px;
  padding-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(219, 231, 244, .5);
}
.footer-legal { display: flex; gap: 18px; }
.footer-legal a { color: rgba(219, 231, 244, .62); }
.footer-legal a:hover { color: #fff; }

/* ---------------- 轻量动效 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .hero-inner { gap: 36px; padding: 64px 24px 72px; }
  .primary-nav { gap: 18px; }
  .primary-nav ul { gap: 18px; }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .price-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; }
  .contact-layout { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(11, 43, 78, .12);
    padding: 8px 24px 22px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .primary-nav.is-open { display: flex; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav ul li { border-bottom: 1px solid var(--line); }
  .primary-nav ul li:last-child { border-bottom: 0; }
  .primary-nav ul a { display: block; padding: 13px 0; font-size: 16px; }
  .primary-nav ul a.is-active::after { display: none; }
  .nav-actions { margin-top: 16px; flex-direction: column; align-items: stretch; gap: 10px; }
  .nav-actions .btn { width: 100%; border-radius: 10px; }
  .site-header { position: sticky; }
}

@media (max-width: 720px) {
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 30px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .tier--featured { transform: none; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 24px 20px; }
  .cta-band { padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
  .page-hero { padding: 46px 0 42px; }
  .compare { min-width: 640px; }
  .compare th, .compare td { padding: 12px 14px; font-size: 13.5px; }
  .flow-card { padding: 20px 18px 16px; }
  .brand-text strong { font-size: 16.5px; }
  .hero-actions .btn { width: 100%; }
  .hero-actions { gap: 10px; }
}

@media (max-width: 420px) {
  .shell { padding: 0 18px; }
  .tier-price strong { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .chips li { font-size: 12.5px; }
  .info-card .big { font-size: 21px; }
}

/* ---------------- 补充组件 ---------------- */
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy-2);
}
.card-link svg { width: 16px; height: 16px; transition: transform .18s ease; }
.card-link:hover svg { transform: translateX(3px); }

.prose-list { display: grid; gap: 9px; margin: 0; }
.prose-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.78;
}
.prose-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(42, 167, 240, .6);
}

.module-scene {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.75;
}

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--navy-2);
  background: var(--soft-2);
  padding: 3px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.solution-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.solution-main h2 { font-size: 20px; margin: 2px 0 6px; }
.solution-main h3 {
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--ink-3);
  margin: 20px 0 8px;
}
.solution-main p { font-size: 14.5px; color: var(--ink-2); line-height: 1.85; }

.solution-side {
  align-self: start;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.side-label { font-size: 12.5px; color: var(--ink-3); letter-spacing: .06em; }
.side-text { font-size: 14.5px; font-weight: 600; color: var(--ink); margin: 6px 0 18px; }
.side-note { font-size: 12.5px; color: var(--ink-3); margin-top: 12px; line-height: 1.7; }

.flow-line { display: flex; flex-wrap: wrap; gap: 20px 22px; margin: 0; }
.flow-line li {
  position: relative;
  font-size: 13.5px;
  color: var(--navy-2);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
}
.flow-line li + li::before {
  content: "→";
  position: absolute;
  left: -15px;
  top: 50%;
  transform: translateY(-54%);
  font-size: 12px;
  color: var(--ink-3);
}

.table-hint { margin-top: 14px; font-size: 13px; color: var(--ink-3); }

@media (max-width: 900px) {
  .solution-block { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .solution-block { padding: 22px 20px; gap: 22px; }
  .flow-line { gap: 16px; }
}