/* ==========================================================================
   词元光年科技有限公司 · 官网样式
   设计基调：简约 / 大气 / 科技感 —— 深色首屏 + 大面积留白 + 单一蓝色强调
   ========================================================================== */

:root {
  --ink: #0D1B2E;
  --ink-soft: #27364D;
  --muted: #63748C;
  --line: #E5EAF2;
  --bg: #FFFFFF;
  --bg-soft: #F6F8FC;
  --blue: #2C63FF;
  --blue-dark: #1E4BD6;
  --cyan: #00B6D8;
  --navy: #07162C;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(13, 27, 46, .09);
  --container: 1200px;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
::selection { background: rgba(44, 99, 255, .18); }
.is-hidden { display: none !important; }

.container { width: min(100% - 48px, var(--container)); margin-inline: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; border: 1px solid transparent; border-radius: 10px;
  font-size: 15px; font-weight: 600; line-height: 1.4;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .25s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 10px 26px rgba(44, 99, 255, .26); }
.btn--primary:hover { background: var(--blue-dark); box-shadow: 0 14px 32px rgba(44, 99, 255, .34); }
.btn--ghost { background: rgba(255, 255, 255, .05); border-color: rgba(255, 255, 255, .28); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .13); border-color: rgba(255, 255, 255, .5); }
.btn--outline { background: #fff; border-color: var(--line); color: var(--ink); }
.btn--outline:hover { border-color: var(--blue); color: var(--blue); }
.btn--sm { padding: 11px 20px; font-size: 14px; }
.btn__arrow { font-size: 18px; line-height: 1; transition: transform .25s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 20px rgba(13, 27, 46, .05); }
.header__inner { height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand__mark { width: 40px; height: 40px; border-radius: 11px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__text strong { font-size: 18px; font-weight: 700; letter-spacing: .06em; color: var(--ink); }
.brand__text small { font-size: 9px; letter-spacing: .19em; color: #8A9AB0; font-weight: 600; margin-top: 3px; }
.brand--light .brand__text strong { color: #fff; }
.brand--light .brand__text small { color: rgba(255, 255, 255, .5); }

.nav { display: flex; align-items: center; gap: 34px; }
.nav__link { position: relative; font-size: 15px; color: var(--ink-soft); padding: 8px 0; transition: color .2s ease; }
.nav__link::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--blue); border-radius: 2px; transition: width .25s ease;
}
.nav__link:hover, .nav__link.is-active { color: var(--blue); }
.nav__link:hover::after, .nav__link.is-active::after { width: 100%; }
.nav__cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 9px; background: var(--blue); color: #fff;
  font-size: 14px; font-weight: 600; transition: background .2s ease, transform .2s ease;
}
.nav__cta:hover { background: var(--blue-dark); transform: translateY(-1px); }
.nav__toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 10px; padding: 11px 9px; }
.nav__toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; margin: 4px 0; transition: transform .25s ease, opacity .25s ease; }
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: radial-gradient(900px 620px at 78% 34%, rgba(44, 99, 255, .28), transparent 65%),
              radial-gradient(600px 500px at 20% 90%, rgba(0, 182, 216, .12), transparent 70%),
              var(--navy);
  color: #fff;
  padding: 92px 0 130px;
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  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: linear-gradient(90deg, transparent, #000 25%, #000 75%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 25%, #000 75%, transparent);
}
.hero::after {
  content: ''; position: absolute; left: -10%; top: -60%; width: 60%; height: 180%;
  background: linear-gradient(105deg, transparent 40%, rgba(120, 170, 255, .07) 50%, transparent 60%);
  transform: rotate(12deg); pointer-events: none;
}
.hero__inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero__copy { max-width: 620px; }
.eyebrow { display: flex; align-items: center; gap: 12px; font-size: 12px; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--blue); }
.eyebrow__line { width: 28px; height: 1px; background: currentColor; }
.eyebrow--light { color: #7FB0FF; }
.hero h1 { font-size: clamp(36px, 4.2vw, 58px); line-height: 1.28; font-weight: 700; letter-spacing: -.02em; margin-top: 26px; }
.grad { background: linear-gradient(100deg, #6FA8FF, #46D5F0); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__desc { margin-top: 24px; font-size: 17px; line-height: 1.9; color: #B7C8DF; max-width: 560px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 38px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 52px; padding-top: 26px; border-top: 1px solid rgba(255,255,255,.12); }
.hero__tags span { display: inline-flex; align-items: center; gap: 9px; font-size: 13px; color: #AFC2DC; }
.hero__tags i { width: 6px; height: 6px; border-radius: 50%; background: #46D5F0; box-shadow: 0 0 10px #46D5F0; }

/* 光年视觉 */
.orbit { position: relative; width: 100%; max-width: 440px; aspect-ratio: 1; margin-inline: auto; }
.orbit__ring { position: absolute; border-radius: 50%; border: 1px solid rgba(255,255,255,.12); }
.orbit__ring--1 { inset: 0; }
.orbit__ring--2 { inset: 11%; border-style: dashed; border-color: rgba(255,255,255,.16); animation: spin 60s linear infinite; }
.orbit__ring--3 { inset: 22%; border-color: rgba(120,170,255,.22); }
.orbit__halo { position: absolute; inset: 14%; border-radius: 50%; background: radial-gradient(circle, rgba(44,99,255,.42), transparent 68%); filter: blur(24px); }
.orbit__core {
  position: absolute; inset: 35%; border-radius: 50%;
  background: radial-gradient(circle at 34% 28%, #8FC0FF, #2C63FF 52%, #0C2C93 100%);
  box-shadow: 0 0 60px rgba(44, 99, 255, .65), inset 0 0 26px rgba(255,255,255,.28);
  display: grid; place-items: center; color: #fff;
}
.orbit__core svg { width: 42%; opacity: .95; }
.orbit__dot { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: #58D8F5; box-shadow: 0 0 14px #58D8F5; }
.orbit__dot--a { top: 5%; left: 52%; }
.orbit__dot--b { bottom: 19%; left: 9%; width: 6px; height: 6px; background: #fff; box-shadow: 0 0 12px #fff; }
.orbit__card {
  position: absolute; display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: 12px; font-size: 13px; color: #fff;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 12px 30px rgba(0,0,0,.24); white-space: nowrap;
}
.orbit__card i { width: 8px; height: 8px; border-radius: 50%; background: #4ADE9B; box-shadow: 0 0 10px #4ADE9B; }
.orbit__card small { color: #A9C1E2; font-size: 11px; }
.orbit__card--1 { top: 12%; right: -6%; }
.orbit__card--2 { bottom: 20%; left: -12%; }
.orbit__card--3 { bottom: 2%; right: 4%; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 数据条 ---------- */
.stats { position: relative; z-index: 3; }
.stats__card {
  margin-top: -68px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(7, 22, 44, .10);
  display: grid; grid-template-columns: repeat(4, 1fr); padding: 30px 0;
}
.stat { text-align: center; padding: 8px 18px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat__num { font-size: 38px; font-weight: 700; line-height: 1.2; letter-spacing: -.02em; color: var(--ink); }
.stat__suffix { font-size: 19px; color: var(--blue); margin-left: 2px; font-weight: 600; }
.stat__label { margin-top: 6px; font-size: 13.5px; color: var(--muted); }

/* ---------- 通用区块 ---------- */
.section { padding: 104px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 76px 0; }
.section__head { max-width: 720px; margin-bottom: 54px; }
.section__head--center { margin-inline: auto; text-align: center; }
.section__head--center .eyebrow { justify-content: center; }
.section__title { font-size: clamp(28px, 3vw, 40px); line-height: 1.38; font-weight: 700; letter-spacing: -.02em; margin-top: 16px; }
.section__sub { margin-top: 16px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.section__foot { margin-top: 44px; text-align: center; }

/* ---------- 卡片 ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.card:hover { transform: translateY(-6px); border-color: rgba(44,99,255,.32); box-shadow: var(--shadow); }
.card__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, #EDF3FF, #E5F8FF); color: var(--blue);
}
.card__icon svg { width: 26px; height: 26px; }
.card__no { font-size: 12px; letter-spacing: .14em; color: #9AAAC0; font-weight: 600; }
.card__title { font-size: 20px; font-weight: 650; margin-top: 22px; letter-spacing: -.01em; }
.card__desc { margin-top: 10px; color: var(--muted); font-size: 14.5px; line-height: 1.85; }
.card__link { display: inline-flex; align-items: center; gap: 7px; margin-top: 22px; color: var(--blue); font-size: 14px; font-weight: 600; }
.card__link:hover { gap: 11px; }

/* ---------- 优势 / 理念 ---------- */
.value { padding: 30px 26px; border-left: 2px solid var(--line); transition: border-color .25s ease; }
.value:hover { border-left-color: var(--blue); }
.value__no { font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--blue); }
.value h3 { font-size: 19px; font-weight: 650; margin-top: 12px; }
.value p { color: var(--muted); font-size: 14.5px; margin-top: 10px; line-height: 1.85; }

/* ---------- 服务流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.steps::before { content: ''; position: absolute; left: 6%; right: 6%; top: 25px; height: 1px; background: linear-gradient(90deg, rgba(44,99,255,.1), rgba(44,99,255,.5), rgba(44,99,255,.1)); }
.step { position: relative; text-align: center; padding: 0 12px; }
.step__no {
  position: relative; z-index: 2; width: 50px; height: 50px; margin: 0 auto 22px;
  display: grid; place-items: center; border-radius: 50%; background: #fff;
  border: 1px solid rgba(44,99,255,.3); color: var(--blue); font-weight: 700; font-size: 15px;
  box-shadow: 0 0 0 6px var(--bg-soft);
}
.section:not(.section--soft) .step__no { box-shadow: 0 0 0 6px #fff; }
.step h3 { font-size: 17px; font-weight: 650; }
.step p { margin-top: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.8; }

/* ---------- 标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  padding: 11px 22px; border: 1px solid var(--line); border-radius: 100px;
  background: #fff; color: var(--ink-soft); font-size: 14px;
  transition: border-color .2s ease, color .2s ease, transform .2s ease;
}
.chip:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }

/* ---------- 产品服务：详情块 ---------- */
.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; padding: 76px 0; border-bottom: 1px solid var(--line); }
.feature:last-child { border-bottom: 0; }
.feature--reverse .feature__visual { order: -1; }
.feature__eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .18em; color: var(--blue); }
.feature h2 { font-size: clamp(26px, 2.6vw, 34px); font-weight: 700; margin-top: 14px; letter-spacing: -.02em; }
.feature__lead { margin-top: 16px; color: var(--muted); font-size: 15.5px; line-height: 1.9; }
.feature__list { margin-top: 24px; }
.feature__list li { display: flex; gap: 12px; align-items: flex-start; padding: 7px 0; color: var(--ink-soft); font-size: 15px; }
.feature__list svg { flex-shrink: 0; width: 18px; height: 18px; margin-top: 5px; color: var(--blue); }
.feature__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; }
.feature__tags span { font-size: 12.5px; color: var(--blue); background: #EFF4FF; border-radius: 6px; padding: 6px 12px; }

/* 产品界面示意 */
.mock {
  border-radius: 18px; overflow: hidden; background: #fff;
  border: 1px solid var(--line); box-shadow: 0 26px 60px rgba(13,27,46,.12);
  transform: perspective(1200px) rotateY(-6deg) rotateX(2deg);
  transition: transform .4s ease;
}
.feature:hover .mock { transform: perspective(1200px) rotateY(0) rotateX(0); }
.mock__bar { display: flex; align-items: center; gap: 7px; padding: 14px 18px; background: #F7F9FD; border-bottom: 1px solid var(--line); }
.mock__bar i { width: 9px; height: 9px; border-radius: 50%; background: #D8E0EC; }
.mock__bar i:first-child { background: #FFC7C2; }
.mock__bar i:nth-child(2) { background: #FFE0A6; }
.mock__bar i:nth-child(3) { background: #B9EBCF; }
.mock__bar span { margin-left: auto; font-size: 11px; color: #93A3B8; letter-spacing: .04em; }
.mock__body { padding: 26px; background: linear-gradient(160deg, #fff, #F8FBFF); }
.mock__title { font-size: 13px; color: var(--muted); }
.mock__kpi { display: flex; align-items: baseline; gap: 10px; margin-top: 6px; }
.mock__kpi strong { font-size: 30px; font-weight: 700; color: var(--ink); letter-spacing: -.02em; }
.mock__kpi em { font-style: normal; font-size: 12px; color: #16A36A; }
.mock__chart { display: flex; align-items: flex-end; gap: 10px; height: 108px; margin: 24px 0 22px; padding-bottom: 4px; border-bottom: 1px solid var(--line); }
.mock__chart i { flex: 1; border-radius: 5px 5px 0 0; background: linear-gradient(180deg, #6E9CFF, #DCE8FF); }
.mock__chart i:nth-child(3n) { background: linear-gradient(180deg, #2C63FF, #9CC4FF); }
.mock__rows { display: grid; gap: 12px; }
.mock__rows div { display: flex; align-items: center; gap: 12px; }
.mock__rows small { width: 46px; flex-shrink: 0; color: #93A3B8; font-size: 11px; }
.mock__rows span { height: 8px; border-radius: 6px; background: #E9EFF8; }
.mock__badge {
  position: absolute; bottom: -20px; right: -16px; z-index: 2;
  background: var(--blue); color: #fff; font-size: 12px; font-weight: 600;
  padding: 10px 16px; border-radius: 10px; box-shadow: 0 12px 28px rgba(44,99,255,.35);
}
.feature__visual { position: relative; }

/* ---------- FAQ ---------- */
.faq { max-width: 860px; margin-inline: auto; }
.faq__item { border: 1px solid var(--line); background: #fff; border-radius: 12px; margin-bottom: 12px; overflow: hidden; transition: border-color .2s ease, box-shadow .2s ease; }
.faq__item.is-open { border-color: rgba(44,99,255,.35); box-shadow: 0 8px 24px rgba(13,27,46,.05); }
.faq__q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 19px 24px; background: none; border: 0; text-align: left; font-weight: 600; font-size: 15.5px; color: var(--ink); }
.faq__icon { position: relative; flex-shrink: 0; width: 18px; height: 18px; }
.faq__icon::before, .faq__icon::after { content: ''; position: absolute; background: var(--blue); border-radius: 2px; transition: transform .25s ease; }
.faq__icon::before { left: 0; top: 8px; width: 18px; height: 2px; }
.faq__icon::after { left: 8px; top: 0; width: 2px; height: 18px; }
.faq__item.is-open .faq__icon::after { transform: rotate(90deg); }
.faq__a { max-height: 0; overflow: hidden; padding: 0 24px; color: var(--muted); font-size: 14.5px; line-height: 1.9; transition: max-height .3s ease, padding .3s ease; }
.faq__item.is-open .faq__a { max-height: 260px; padding: 0 24px 20px; }

/* ---------- 内页 Banner ---------- */
.banner { position: relative; overflow: hidden; background: radial-gradient(800px 480px at 82% 10%, rgba(44,99,255,.26), transparent 65%), var(--navy); color: #fff; padding: 84px 0 92px; }
.banner::before {
  content: ''; position: absolute; inset: 0; opacity: .45; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 64px 64px;
}
.banner__inner { position: relative; z-index: 2; }
.banner h1 { font-size: clamp(32px, 4vw, 48px); font-weight: 700; letter-spacing: -.02em; margin-top: 20px; }
.banner p { margin-top: 16px; color: #B7C8DF; font-size: 16.5px; line-height: 1.9; max-width: 680px; }
.crumb { display: flex; gap: 10px; align-items: center; font-size: 13px; color: #8FA6C6; margin-top: 26px; }
.crumb a:hover { color: #fff; }
.crumb span { color: #5D7597; }

/* ---------- 关于我们 ---------- */
.about__intro { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about__intro h2 { font-size: clamp(26px, 2.8vw, 36px); font-weight: 700; line-height: 1.45; letter-spacing: -.02em; }
.about__intro p { margin-top: 20px; color: var(--muted); line-height: 1.95; font-size: 15.5px; }
.about__panel {
  position: relative; border-radius: 20px; padding: 46px 40px; min-height: 300px;
  background: linear-gradient(145deg, #0B1E3C, #123B7A); color: #fff; overflow: hidden;
  box-shadow: 0 26px 60px rgba(7,22,44,.18);
}
.about__panel::after { content: ''; position: absolute; width: 320px; height: 320px; right: -110px; top: -110px; border-radius: 50%; border: 1px solid rgba(255,255,255,.14); box-shadow: 0 0 0 46px rgba(255,255,255,.035), 0 0 0 96px rgba(255,255,255,.025); }
.about__panel small { font-size: 12px; letter-spacing: .2em; color: #8FB6FF; }
.about__panel strong { display: block; font-size: 30px; font-weight: 700; line-height: 1.5; margin-top: 18px; position: relative; z-index: 2; }
.about__panel p { position: relative; z-index: 2; margin-top: 20px; color: #B7C8DF; font-size: 14.5px; line-height: 1.9; max-width: 340px; }

.meaning__item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 36px; }
.meaning__char { font-size: 58px; font-weight: 700; line-height: 1.2; letter-spacing: .1em; background: linear-gradient(120deg, var(--blue), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.meaning__en { font-size: 11px; letter-spacing: .24em; color: #9AAAC0; font-weight: 600; }
.meaning__item h3 { font-size: 20px; font-weight: 650; margin-top: 18px; }
.meaning__item p { color: var(--muted); font-size: 15px; line-height: 1.9; margin-top: 12px; }

/* ---------- CTA ---------- */
.cta { position: relative; overflow: hidden; padding: 84px 0; background: linear-gradient(110deg, #081A35, #10306B 65%, #0C3C74); color: #fff; }
.cta::before { content: ''; position: absolute; width: 620px; height: 620px; border-radius: 50%; right: -160px; top: -320px; background: radial-gradient(circle, rgba(70,213,240,.22), transparent 65%); }
.cta::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); background-size: 64px 64px; opacity: .4; }
.cta__inner { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta h2 { font-size: clamp(26px, 2.8vw, 36px); font-weight: 700; letter-spacing: -.02em; }
.cta p { margin-top: 12px; color: #B7C8DF; font-size: 15.5px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 26px; align-items: start; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 34px; }
.panel h2 { font-size: 22px; font-weight: 700; }
.panel__sub { color: var(--muted); font-size: 14.5px; margin-top: 8px; }
.info-list { margin-top: 28px; }
.info-item { display: flex; gap: 18px; align-items: flex-start; padding: 20px 0; border-top: 1px solid var(--line); }
.info-item:first-child { border-top: 0; }
.info-item__icon { flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: #EFF4FF; color: var(--blue); }
.info-item__icon svg { width: 21px; height: 21px; }
.info-item__label { font-size: 12.5px; color: #93A3B8; letter-spacing: .06em; }
.info-item__value { font-size: 19px; font-weight: 650; margin-top: 3px; word-break: break-all; }
.info-item__value a:hover { color: var(--blue); }
.info-item__hint { font-size: 13px; color: var(--muted); margin-top: 4px; }

.qr-card { text-align: center; }
.qr-card__head { display: flex; align-items: center; justify-content: center; gap: 10px; }
.qr-frame { width: 252px; max-width: 100%; margin: 26px auto 0; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 14px 36px rgba(13,27,46,.08); }
.qr-frame img { width: 100%; border-radius: 10px; }
.qr-card__label { margin-top: 20px; font-size: 16px; font-weight: 650; }
.qr-card__id { margin-top: 6px; font-size: 14px; color: var(--muted); }
.qr-card__note { margin-top: 22px; padding: 14px 16px; border-radius: 10px; background: var(--bg-soft); color: var(--muted); font-size: 13px; line-height: 1.8; text-align: left; }
.qr-card__note code { color: var(--blue); font-size: 12.5px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 26px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--ink-soft); }
.field label i { color: var(--blue); font-style: normal; }
.field input, .field textarea {
  width: 100%; padding: 13px 15px; border: 1px solid var(--line); border-radius: 10px;
  background: #FBFCFE; color: var(--ink); font-size: 14.5px; outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(44,99,255,.1); background: #fff; }
.field textarea { resize: vertical; min-height: 118px; }
.form__foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.form__note { font-size: 12.5px; color: var(--muted); }

/* ---------- 页脚 ---------- */
.site-footer { background: #061225; color: #fff; padding: 72px 0 0; }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 56px; }
.footer__brand p { color: #93A8C4; font-size: 14px; line-height: 1.9; margin-top: 20px; max-width: 300px; }
.footer__col h4 { font-size: 15px; font-weight: 650; margin-bottom: 20px; }
.footer__col li { margin-bottom: 12px; }
.footer__col a, .footer__col span { color: #93A8C4; font-size: 14px; transition: color .2s ease; }
.footer__col a:hover { color: #fff; }
.footer__col .footer__phone { display: block; font-size: 20px; font-weight: 650; color: #fff; margin-bottom: 4px; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.09); padding: 24px 0; display: flex; align-items: center; justify-content: space-between; gap: 12px 16px; flex-wrap: wrap; color: #7189A8; font-size: 13px; }
.footer__beian { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 22px; }
.beian-link { display: inline-flex; align-items: center; gap: 6px; color: #8FA6C6; font-size: 13px; transition: color .2s ease; }
.beian-link:hover { color: #fff; }
.beian-link__icon { width: 14px; height: 14px; flex-shrink: 0; opacity: .85; }

/* ---------- 滚动渐显（内容默认可见，动画仅为增强，绝不隐藏内容） ---------- */
.js [data-reveal].is-visible { animation: reveal-up .7s cubic-bezier(.2, .7, .2, 1); }
@keyframes reveal-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__inner { gap: 32px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature { gap: 44px; }
  .footer__top { grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
  .footer__top > :last-child { grid-column: 1 / -1; }
  .orbit__card--1 { right: 0; }
  .orbit__card--2 { left: -4%; }
}
@media (max-width: 900px) {
  .nav {
    display: none; position: absolute; top: 78px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 30px rgba(13,27,46,.1); padding: 12px 24px 22px;
  }
  .nav.is-open { display: flex; }
  .nav__link { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav__link::after { display: none; }
  .nav__cta { align-self: flex-start; margin-top: 18px; }
  .nav__toggle { display: block; }
  .hero { padding: 68px 0 120px; }
  .hero__inner { grid-template-columns: 1fr; gap: 48px; }
  .hero__copy { max-width: none; }
  .orbit { max-width: 380px; }
  .about__intro, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .feature, .feature--reverse .feature__visual { grid-template-columns: 1fr; order: 0; gap: 36px; }
  .feature { padding: 56px 0; }
  .mock { transform: none; }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .steps::before { display: none; }
  .section { padding: 76px 0; }
}
@media (max-width: 680px) {
  .container { width: min(100% - 36px, var(--container)); }
  .header__inner { height: 68px; }
  .nav { top: 68px; }
  .brand__text strong { font-size: 16px; }
  .hero { padding: 56px 0 110px; }
  .hero h1 { font-size: 34px; }
  .hero__desc { font-size: 15.5px; }
  .hero__tags { gap: 10px 18px; margin-top: 36px; }
  .orbit { max-width: 300px; }
  .orbit__card { font-size: 11px; padding: 9px 11px; }
  .orbit__card small { display: none; }
  .orbit__card--1 { right: -4%; }
  .orbit__card--2 { left: -8%; }
  .stats__card { grid-template-columns: repeat(2, 1fr); gap: 8px 0; padding: 22px 0; margin-top: -56px; }
  .stat { border-right: 0; }
  .stat:nth-child(odd) { border-right: 1px solid var(--line); }
  .stat__num { font-size: 30px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .section__head { margin-bottom: 36px; }
  .section__title { font-size: 27px; }
  .banner { padding: 62px 0 70px; }
  .banner h1 { font-size: 31px; }
  .cta { padding: 62px 0; }
  .cta__inner { gap: 26px; }
  .form-grid { grid-template-columns: 1fr; }
  .panel { padding: 26px 22px; }
  .footer__top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer__top > :first-child { grid-column: 1 / -1; }
  .footer__top > :last-child { grid-column: 1 / -1; }
  .meaning__char { font-size: 46px; }
  .about__panel { padding: 34px 28px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .js [data-reveal].is-visible { animation: none; }
}