/* ==========================================================================
   西安长鲸云科技有限公司 · 企业官网样式
   设计基调：深海军蓝 × 电光蓝，编辑式排版，细线分隔，等宽微标签，克制留白
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --navy-900: #04101F;
  --navy-800: #071A2F;
  --navy-700: #0B2440;
  --blue: #1A5CE5;
  --blue-600: #1450CB;
  --blue-300: #7FA8FF;
  --sky: #3EA8FF;
  --ink: #0A1626;
  --body: #111111;
  --muted: #999999;
  --line: rgba(10, 22, 38, .10);
  --line-strong: rgba(10, 22, 38, .17);
  --mist: #F5F8FD;
  --white: #fff;
  --sans: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --mono: "Cascadia Mono", "Cascadia Code", ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1240px;
  --pad: clamp(20px, 4vw, 44px);
  --sec: clamp(76px, 9vw, 128px);
  --ease: cubic-bezier(.16, .84, .44, 1);
  --header-h: 78px;
  --r-card: 14px;
  --r-ctl: 10px;
  --r-pill: 999px;
  --shadow-card: 0 22px 52px -30px rgba(6, 22, 44, .34);
  --shadow-soft: 0 14px 34px -24px rgba(6, 22, 44, .28);
}

/* ---------- 基础重置 ---------- */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5 { margin: 0; color: #111111; font-weight: 600; line-height: 1.25; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; color: inherit; }
::selection { background: var(--blue); color: #fff; }

/* ---------- 通用布局 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.section { padding: var(--sec) 0; }
.section--mist { background: var(--mist); }
.section--tight { padding-top: clamp(52px, 6vw, 84px); }

.mono { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; }
.idx {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.idx::after { content: ""; width: 46px; height: 1px; background: currentColor; opacity: .45; }

.sec-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 28px 48px; margin-bottom: clamp(40px, 5vw, 68px); }
.sec-head__main { max-width: 640px; }
.sec-head h2 { font-size: clamp(1.75rem, 3.4vw, 2.7rem); margin-top: 18px; }
.sec-head__aside { max-width: 360px; }
.sec-head__aside p { color: var(--muted); margin: 0 0 14px; font-size: 15px; }

/* ---------- 链接与按钮 ---------- */
.link-arrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500; color: var(--ink);
  padding-bottom: 4px; position: relative;
}
.link-arrow::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: currentColor; transform-origin: left; transform: scaleX(0);
  transition: transform .5s var(--ease);
}
.link-arrow:hover::after, .link-arrow:focus-visible::after,
.link-arrow.is-current::after { transform: scaleX(1); }
.link-arrow svg { width: 16px; height: 16px; transition: transform .45s var(--ease); }
.link-arrow:hover { color: var(--blue); }
.link-arrow:hover svg { transform: translateX(5px); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 30px; border: 0; cursor: pointer;
  font-size: 15px; font-weight: 500; letter-spacing: .01em;
  border-radius: var(--r-ctl); position: relative; overflow: hidden;
  transition: color .35s var(--ease), background-color .35s var(--ease), transform .35s var(--ease), border-color .35s var(--ease);
}
.btn svg { width: 17px; height: 17px; transition: transform .45s var(--ease); }
.btn:hover svg { transform: translateX(4px); }
.btn--solid { background: var(--blue); color: #fff; }
.btn--solid:hover { background: var(--blue-600); }
.btn--ghost { color: var(--white); border: 1px solid rgba(255, 255, 255, .34); background: rgba(255, 255, 255, .04); backdrop-filter: blur(6px); }
.btn--ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .12); }
.btn--outline { color: var(--ink); border: 1px solid var(--line-strong); background: transparent; }
.btn--outline:hover { border-color: var(--blue); color: var(--blue); }
.btn--sm { height: 42px; padding: 0 20px; font-size: 14px; }

/* ---------- 表单字段（联系页） ---------- */
.field { display: block; }
.field input[type=text], .field input[type=email], .field input[type=tel], .field input[type=password], .field textarea, .field select {
  width: 100%; border: 1px solid var(--line-strong); background: #fff; color: var(--ink);
  padding: 13px 15px; border-radius: var(--r-ctl); outline: none;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.field textarea { min-height: 150px; resize: vertical; line-height: 1.7; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26, 92, 229, .12);
}
.field input::placeholder, .field textarea::placeholder { color: #aab0bb; opacity: 1; }

/* ---------- 报头 / 导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  height: var(--header-h); display: flex; align-items: center;
  color: #fff;
  transition: background-color .5s var(--ease), color .5s var(--ease), box-shadow .5s var(--ease), height .4s var(--ease);
}
.site-header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: rgba(255, 255, 255, .14); opacity: 1; transition: opacity .5s var(--ease);
}
/* 报头毛玻璃背景必须放在伪元素上，不能直接写在 .site-header 上：
   凡带 filter / backdrop-filter / transform / will-change 的元素，都会成为其内部
   position:fixed 后代的「包含块」。手机端 .site-nav 是 inset:0 的整屏抽屉，一旦报头
   成了它的包含块，抽屉就会按报头高度（68px）而不是视口来撑开 ——
   抽屉内容溢出成悬浮层、滚动也不消失，且菜单本身失去整屏高度。 */
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(255, 255, 255, .92);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  opacity: 0; transition: opacity .5s var(--ease);
}
.site-header.is-stuck::before { opacity: 1; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; width: 100%; }

.site-header.is-stuck {
  color: var(--ink);
  box-shadow: 0 10px 40px -24px rgba(6, 22, 44, .5);
}
.site-header.is-stuck::after { opacity: 0; }

.brand { display: inline-flex; align-items: center; gap: 13px; }
.brand-mark { display: inline-flex; width: 38px; height: 38px; color: #fff; }
.site-header.is-stuck .brand-mark { color: var(--navy-800); }
.brand-mark svg { width: 100%; height: 100%; }
.brand-logo { height: 40px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text b { font-size: 19px; font-weight: 600; letter-spacing: .02em; }
.brand-text em { font-family: var(--mono); font-style: normal; font-size: 9.5px; letter-spacing: .22em; opacity: .62; margin-top: 4px; }

.site-nav { display: flex; align-items: center; gap: 34px; }
.nav-link { font-size: 15px; position: relative; padding: 6px 0; opacity: .92; }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .45s var(--ease);
}
.nav-link:hover::after, .nav-link.is-active::after { transform: scaleX(1); transform-origin: left; }
.nav-link.is-active { opacity: 1; font-weight: 500; }
.nav-phone {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 13.5px; letter-spacing: .06em;
  padding: 9px 16px; border: 1px solid rgba(255, 255, 255, .28); border-radius: var(--r-ctl);
  transition: border-color .4s var(--ease), background-color .4s var(--ease), color .4s var(--ease);
}
.nav-phone svg { width: 15px; height: 15px; }
.nav-phone:hover { border-color: var(--sky); color: var(--sky); }
.site-header.is-stuck .nav-phone { border-color: var(--line-strong); }
.site-header.is-stuck .nav-phone:hover { border-color: var(--blue); color: var(--blue); background: rgba(26, 92, 229, .05); }

.nav-toggle { display: none; width: 44px; height: 44px; border: 0; background: transparent; cursor: pointer; padding: 12px 10px; }
.nav-toggle span { display: block; height: 1.5px; background: currentColor; transition: transform .4s var(--ease), opacity .3s var(--ease); }
.nav-toggle span + span { margin-top: 7px; }
body.nav-open .nav-toggle span:first-child { transform: translateY(4.25px) rotate(45deg); }
body.nav-open .nav-toggle span:last-child { transform: translateY(-4.25px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding: calc(var(--header-h) + 40px) 0 0;
  overflow: hidden; background: var(--navy-900); color: #fff;
}
.hero__media { position: absolute; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; opacity: .72; transform: scale(1.06); animation: heroZoom 18s var(--ease) forwards; }
@keyframes heroZoom { to { transform: scale(1); } }
.hero__media::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 16, 31, .96) 0%, rgba(4, 16, 31, .86) 40%, rgba(4, 16, 31, .40) 78%, rgba(4, 16, 31, .55) 100%),
    linear-gradient(180deg, rgba(4, 16, 31, .75) 0%, rgba(4, 16, 31, .10) 34%, rgba(4, 16, 31, .92) 100%);
}
.hero__grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 92px 92px, 92px 92px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
}
.hero__glow {
  position: absolute; width: 760px; height: 760px; right: -14%; top: -28%;
  background: radial-gradient(circle, rgba(26, 92, 229, .42) 0%, rgba(26, 92, 229, 0) 62%);
  filter: blur(10px); pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; width: 100%; padding-bottom: clamp(90px, 12vh, 150px); }
.hero__col { max-width: 700px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--blue-300); margin-bottom: 28px;
}
.hero__eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--sky); }
.hero h1 {
  color: #fff; font-size: clamp(2.15rem, 5.2vw, 4.15rem); font-weight: 600;
  letter-spacing: -.02em; line-height: 1.16; margin-bottom: 26px;
}
.hero h1 .hl { color: var(--sky); }
.hero__desc { font-size: clamp(1rem, 1.15vw, 1.15rem); color: rgba(255, 255, 255, .76); max-width: 560px; margin-bottom: 42px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__meta { margin-top: 54px; display: flex; flex-wrap: wrap; gap: 14px 40px; font-family: var(--mono); font-size: 12px; letter-spacing: .14em; color: rgba(255, 255, 255, .55); text-transform: uppercase; }
.hero__meta span { display: inline-flex; align-items: center; gap: 10px; }
.hero__meta span::before { content: ""; width: 5px; height: 5px; background: var(--sky); border-radius: 50%; }

/* 首屏底部滚动提示 + 关键词跑马灯 */
.hero__foot { position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; }
.marquee { border-top: 1px solid rgba(255, 255, 255, .14); border-bottom: 1px solid rgba(255, 255, 255, .14); background: rgba(4, 16, 31, .45); backdrop-filter: blur(4px); overflow: hidden; }
.marquee__track { display: flex; width: max-content; animation: marquee 38s linear infinite; }
.marquee__track span {
  display: inline-flex; align-items: center; gap: 22px;
  padding: 16px 22px; font-family: var(--mono); font-size: 12.5px; letter-spacing: .18em;
  color: rgba(255, 255, 255, .68); text-transform: uppercase; white-space: nowrap;
}
.marquee__track span::after { content: ""; width: 5px; height: 5px; background: var(--blue-300); border-radius: 50%; opacity: .8; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 页头横幅（内页） ---------- */
.page-hero { position: relative; padding: calc(var(--header-h) + 78px) 0 74px; background: var(--navy-900); color: #fff; overflow: hidden; }
.page-hero__media { position: absolute; inset: 0; }
.page-hero__media img { width: 100%; height: 100%; object-fit: cover; opacity: .34; }
.page-hero__media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(4, 16, 31, .82) 0%, rgba(4, 16, 31, .95) 100%); }
.page-hero .hero__grid { mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 90%); -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .8), transparent 90%); }
.page-hero__inner { position: relative; z-index: 2; }
.crumb { font-family: var(--mono); font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: rgba(255, 255, 255, .5); margin-bottom: 22px; }
.crumb a:hover { color: var(--sky); }
.crumb em { font-style: normal; color: var(--blue-300); }
.page-hero h1 { color: #fff; font-size: clamp(1.95rem, 4vw, 3rem); max-width: 820px; }
.page-hero p { color: rgba(255, 255, 255, .68); max-width: 620px; margin: 20px 0 0; }

/* ---------- 解决方案列表 ---------- */
.service-list { border-top: 1px solid var(--line-strong); }
.service-row { position: relative; display: grid; grid-template-columns: 96px minmax(0, 1fr) 220px auto; gap: 30px; align-items: center; padding: 34px 0; border-bottom: 1px solid var(--line); }
.service-row__no { font-family: var(--mono); font-size: 13px; letter-spacing: .1em; color: var(--muted); transition: color .4s var(--ease); }
.service-row h3 { font-size: clamp(1.15rem, 1.9vw, 1.5rem); margin-bottom: 10px; transition: color .4s var(--ease), transform .5s var(--ease); }
.service-row p { margin: 0; font-size: 15px; color: var(--muted); max-width: 620px; }
.service-row__en { font-family: var(--mono); font-size: 11px; letter-spacing: .2em; color: var(--muted); text-transform: uppercase; text-align: right; }
.service-row__go { width: 46px; height: 46px; border: 1px solid var(--line-strong); border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: var(--ink); transition: all .45s var(--ease); }
.service-row__go svg { width: 17px; height: 17px; }
.service-row::after { content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .6s var(--ease); }
.service-row:hover::after { transform: scaleX(1); }
.service-row:hover .service-row__no { color: var(--blue); }
.service-row:hover h3 { color: var(--blue); transform: translateX(6px); }
.service-row:hover .service-row__go { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- 数据 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line-strong); }
.stat { padding: 40px 46px 40px 0; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat:not(:first-child) { padding-left: 46px; }
.stat__num { font-family: var(--mono); font-size: clamp(2.4rem, 4.4vw, 3.5rem); font-weight: 600; color: #111111; letter-spacing: -.02em; line-height: 1; display: flex; align-items: baseline; }
.stat__num em { font-style: normal; font-size: .42em; color: var(--blue); margin-left: 4px; font-weight: 500; }
.stat__num--text { font-size: clamp(1.05rem, 1.9vw, 1.42rem); letter-spacing: 0; line-height: 1.45; word-break: break-word; overflow-wrap: anywhere; }
.stat__label { margin-top: 16px; font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr); gap: clamp(40px, 6vw, 84px); align-items: center; }
.about-grid--flip .about-copy { order: 2; }
.about-grid--flip .about-media { order: 1; }
.value-cell { padding: 34px 34px 34px 0; border-top: 1px solid var(--line-strong); }
/* 右列文字与左侧分割线保持与左列同等的间距 */
.value-cell:nth-child(even) { padding-left: 34px; }
.value-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; }
.value-cell:nth-child(odd) { border-right: 1px solid var(--line); }
.about-copy h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); margin: 18px 0 24px; }
.about-copy .prose { color: var(--body); font-size: 15.5px; }
.points { margin-top: 34px; border-top: 1px solid var(--line-strong); }
.points li { display: flex; gap: 16px; align-items: flex-start; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 15px; color: var(--ink); }
.points li::before { content: ""; flex: none; width: 7px; height: 7px; margin-top: 11px; background: var(--blue); border-radius: 50%; }
.about-media { position: relative; }
.about-media img { width: 100%; height: clamp(320px, 40vw, 470px); object-fit: cover; border-radius: var(--r-card); box-shadow: var(--shadow-soft); }
.about-media::before { content: ""; position: absolute; right: -18px; top: -18px; width: 148px; height: 148px; border-top: 2px solid var(--blue); border-right: 2px solid var(--blue); opacity: .55; }
.about-media::after { content: ""; position: absolute; left: -18px; bottom: -18px; width: 108px; height: 108px; background: var(--blue); opacity: .1; }
.about-media figcaption { position: absolute; left: 24px; bottom: 22px; font-family: var(--mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: rgba(255, 255, 255, .85); }

/* ---------- 新闻 ---------- */
.news-list { border-top: 1px solid var(--line-strong); }
.news-row { display: grid; grid-template-columns: 132px minmax(0, 1fr) auto; gap: 28px; align-items: center; padding: 26px 0; border-bottom: 1px solid var(--line); transition: background-color .4s var(--ease); }
.news-row__date { font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em; color: var(--muted); }
.news-row h3 { font-size: 1.06rem; line-height: 1.5; font-weight: 500; transition: color .35s var(--ease), transform .45s var(--ease); }
.news-row__cat { display: inline-block; margin-top: 8px; font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: var(--blue); text-transform: uppercase; }
.news-row__go { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line-strong); display: inline-flex; align-items: center; justify-content: center; color: var(--ink); transition: all .4s var(--ease); }
.news-row__go svg { width: 16px; height: 16px; }
.news-row:hover h3 { color: var(--blue); transform: translateX(6px); }
.news-row:hover .news-row__go { background: var(--blue); border-color: var(--blue); color: #fff; }

.news-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.news-card { display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--r-card); overflow: hidden; transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease); }
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); border-color: rgba(26, 92, 229, .28); }
.news-card__media { display: block; overflow: hidden; background: var(--mist); }
.news-card__media img { width: 100%; height: 210px; object-fit: cover; transition: transform .8s var(--ease); }
.news-card:hover .news-card__media img { transform: scale(1.06); }
.news-card h3 { font-size: 1.08rem; line-height: 1.55; padding: 20px 22px 0; margin-bottom: 12px; font-weight: 500; transition: color .35s var(--ease); }
.news-card:hover h3 { color: var(--blue); }
.news-card p { margin: 0; font-size: 14px; color: #AAAAAA; padding: 0 22px 10px; }
/* 日期 + 分类固定沉底，与同排卡片对齐 */
.news-card__meta { display: flex; gap: 16px; margin-top: auto; padding: 8px 22px 16px; font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; }

/* ---------- 行动号召 ---------- */
.cta { position: relative; overflow: hidden; background: var(--navy-900); color: #fff; padding: clamp(64px, 8vw, 110px) 0; }
.cta__glow { position: absolute; width: 900px; height: 900px; left: 50%; top: -40%; transform: translateX(-50%); background: radial-gradient(circle, rgba(26, 92, 229, .38) 0%, rgba(26, 92, 229, 0) 60%); }
.cta__grid { position: absolute; inset: 0; opacity: .7;
  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: 72px 72px; mask-image: radial-gradient(circle at 50% 40%, #000, transparent 74%); -webkit-mask-image: radial-gradient(circle at 50% 40%, #000, transparent 74%); }
.cta-inner { position: relative; z-index: 2; display: flex; flex-wrap: wrap; gap: 40px 60px; align-items: flex-end; justify-content: space-between; }
.cta h2 { color: #fff; font-size: clamp(1.75rem, 3.6vw, 2.75rem); max-width: 620px; margin-top: 18px; }
.cta p { color: rgba(255, 255, 255, .64); max-width: 560px; margin: 20px 0 0; }
.cta__side { display: flex; flex-direction: column; gap: 22px; align-items: flex-start; }
.cta__tel { font-family: var(--mono); font-size: clamp(1.3rem, 2.4vw, 1.85rem); letter-spacing: .02em; color: #fff; }
.cta__tel span { display: block; font-size: 11.5px; letter-spacing: .18em; color: rgba(255, 255, 255, .5); text-transform: uppercase; margin-bottom: 8px; }

/* ---------- 页脚 ---------- */
.site-footer { position: relative; background: var(--navy-900); color: rgba(255, 255, 255, .62); padding-top: clamp(56px, 7vw, 84px); overflow: hidden; }
.footer-glow { position: absolute; width: 620px; height: 620px; left: -8%; bottom: -58%; background: radial-gradient(circle, rgba(26, 92, 229, .3), transparent 62%); }
.footer-top { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr); gap: 52px; padding-bottom: 52px; }
.brand-light { color: #fff; }
.brand-light .brand-mark { color: #fff; }
.footer-desc { margin: 26px 0 18px; max-width: 380px; font-size: 14.5px; line-height: 1.85; }
.footer-mono { font-family: var(--mono); font-size: 11px; letter-spacing: .24em; color: rgba(255, 255, 255, .34); }
.footer-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.footer-col h5 { font-family: var(--mono); font-size: 11.5px; letter-spacing: .18em; text-transform: uppercase; color: rgba(255, 255, 255, .45); font-weight: 500; margin-bottom: 22px; }
.footer-col a, .footer-col p { display: block; font-size: 14.5px; margin: 0 0 13px; color: rgba(255, 255, 255, .62); transition: color .35s var(--ease), transform .35s var(--ease); }
.footer-col a:hover { color: #fff; transform: translateX(4px); }
.footer-tel { font-family: var(--mono); font-size: 1.22rem; color: #fff !important; letter-spacing: .02em; margin-bottom: 18px !important; }
.footer-bottom { position: relative; z-index: 2; display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; align-items: center; padding: 24px 0 30px; border-top: 1px solid rgba(255, 255, 255, .12); font-size: 13px; color: rgba(255, 255, 255, .44); }
.footer-copy { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.footer-copy a:hover { color: #fff; }
.footer-sep { color: rgba(255, 255, 255, .22); }
.footer-meta { display: inline-flex; gap: 22px; }
.footer-meta a:hover { color: #fff; }

/* ---------- 回到顶部 ---------- */
.to-top { position: fixed; right: 26px; bottom: 26px; z-index: 50; width: 46px; height: 46px; border: 1px solid var(--line-strong); background: #fff; color: var(--ink); border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(10px); transition: all .4s var(--ease); box-shadow: 0 12px 30px -18px rgba(6, 22, 44, .55); }
.to-top svg { width: 18px; height: 18px; }
.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--blue); border-color: var(--blue); color: #fff; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 28px; }
.field { position: relative; }
.field--full { grid-column: 1 / -1; }
.field label { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--line-strong); background: #fff; color: var(--ink);
  padding: 13px 15px; font-size: 15.5px; border-radius: var(--r-ctl); outline: none; line-height: 1.6;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.field textarea { min-height: 132px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26, 92, 229, .12); }
.field input::placeholder, .field textarea::placeholder { color: rgba(10, 22, 38, .36); }
.form-note { margin-top: 22px; font-size: 14px; padding: 14px 18px; border-left: 2px solid var(--blue); border-radius: 0 var(--r-ctl) var(--r-ctl) 0; background: rgba(26, 92, 229, .06); color: var(--ink); }
.form-note--ok { border-left-color: #12A150; background: rgba(18, 161, 80, .07); }
.form-note--err { border-left-color: #E5484D; background: rgba(229, 72, 77, .07); }

/* ---------- 联系页信息块 ---------- */
.contact-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: clamp(40px, 6vw, 86px); align-items: start; }
.stats--3 { grid-template-columns: repeat(3, 1fr); }
.stats--3 .stat:last-child { border-right: 0; }
.info-blocks { border-top: 1px solid var(--line-strong); }
.info-block { display: grid; grid-template-columns: 108px minmax(0, 1fr); gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.info-block dt { font-family: var(--mono); font-size: 11.5px; letter-spacing: .16em; text-transform: uppercase; color: var(--muted); padding-top: 6px; }
.info-block dd { margin: 0; font-size: 16.5px; color: var(--ink); }
.info-block dd small { display: block; font-size: 13.5px; color: var(--muted); margin-top: 7px; }

/* ---------- 文章正文 ---------- */
.article { max-width: 820px; }
.article__head { padding-bottom: 34px; border-bottom: 1px solid var(--line-strong); margin-bottom: 40px; }
.article__head h1 { font-size: clamp(1.6rem, 3vw, 2.35rem); line-height: 1.35; }
.article__meta { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 24px; font-family: var(--mono); font-size: 12px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; }
.article__body { font-size: 16.5px; line-height: 1.95; color: #33425A; }
.article__body h4 { font-size: 1.12rem; margin: 40px 0 14px; padding-left: 18px; border-left: 3px solid var(--blue); }
.article__body ul { margin: 0 0 22px; }
.article__body li { position: relative; padding-left: 22px; margin-bottom: 10px; }
.article__body li::before { content: ""; position: absolute; left: 0; top: 12px; width: 6px; height: 6px; background: var(--blue); border-radius: 50%; }
.article__body img { margin: 26px 0; border-radius: var(--r-card); }
.article__body p { margin: 0 0 20px; }
.article__body h2 { font-size: 1.3rem; margin: 42px 0 16px; padding-left: 18px; border-left: 3px solid var(--blue); }
.article__body h3 { font-size: 1.16rem; margin: 34px 0 14px; padding-left: 18px; border-left: 3px solid var(--blue); }
.article__body h5 { font-size: .95rem; margin: 26px 0 10px; color: var(--muted); }
.article__body ol { margin: 0 0 22px; padding-left: 24px; }
.article__body ol li { list-style: decimal; }
.article__body ol li::before { content: none; }
.article__body strong, .article__body b { font-weight: 700; color: var(--ink); }
.article__body a { color: var(--blue); border-bottom: 1px solid currentColor; }
.article__body blockquote { margin: 26px 0; padding: 16px 22px; border-left: 3px solid var(--blue); background: #F5F8FD; color: #3A4A61; }
.article__body table { width: 100%; margin: 26px 0; border-collapse: collapse; font-size: 14.5px; }
.article__body th, .article__body td { border: 1px solid var(--line-strong); padding: 10px 14px; text-align: left; }
.article__body th { background: #F5F8FD; font-weight: 600; }
.article__body hr { margin: 40px 0; border: 0; border-top: 1px solid var(--line); }
.article__body code { font-family: var(--mono); font-size: .9em; background: #F1F5FB; padding: 2px 6px; border-radius: 6px; }
.article__body pre { margin: 26px 0; padding: 18px 20px; background: #F6F8FC; border: 1px solid var(--line); border-radius: var(--r-card); overflow-x: auto; }
.article__body pre code { background: none; padding: 0; }
.article__foot { margin-top: 56px; padding-top: 30px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; align-items: center; }

/* ---------- 分页 ---------- */
.pager { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 52px; }
.pager a, .pager span { min-width: 42px; height: 42px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--line-strong); border-radius: var(--r-ctl); font-family: var(--mono); font-size: 13px; color: var(--ink); transition: all .35s var(--ease); }
.pager a:hover { border-color: var(--blue); color: var(--blue); }
.pager .is-current { background: var(--navy-800); border-color: var(--navy-800); color: #fff; }

/* ---------- 空状态 ---------- */
.empty { padding: 60px 0; font-size: 15px; color: var(--muted); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line); }

/* ---------- 入场动效 ---------- */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .95s var(--ease), transform .95s var(--ease); transition-delay: var(--d, 0s); will-change: opacity, transform; }
[data-reveal].is-in { opacity: 1; transform: none; }
.hero__col > * { opacity: 0; animation: heroUp 1.05s var(--ease) forwards; }
.hero__col > *:nth-child(1) { animation-delay: .15s; }
.hero__col > *:nth-child(2) { animation-delay: .26s; }
.hero__col > *:nth-child(3) { animation-delay: .37s; }
.hero__col > *:nth-child(4) { animation-delay: .48s; }
.hero__col > *:nth-child(5) { animation-delay: .59s; }
@keyframes heroUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }

/* ---------- 移动端菜单 ---------- */
@media (max-width: 1024px) {
  .site-nav {
    position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: 8px;
    background: var(--navy-900); padding: 90px var(--pad) 40px;
    transform: translateY(-100%); transition: transform .6s var(--ease);
    clip-path: none;
  }
  body.nav-open .site-nav { transform: none; }
  /* 菜单展开时锁定背景滚动，避免滑动菜单时页面跟着滚 */
  body.nav-open { overflow: hidden; }
  .site-nav::before {
    content: "CHANGJING CLOUD"; font-family: var(--mono); font-size: 11px; letter-spacing: .3em;
    color: rgba(255, 255, 255, .3); position: absolute; top: 34px; left: var(--pad);
  }
  .nav-link { font-size: 26px; font-weight: 500; color: #fff; padding: 14px 0; opacity: 1; border-bottom: 1px solid rgba(255, 255, 255, .1); width: 100%; }
  .nav-phone { margin-top: 26px; border-color: rgba(255, 255, 255, .3); color: #fff; font-size: 15px; }
  .nav-toggle { display: block; z-index: 70; color: inherit; }
  body.nav-open .nav-toggle { color: #fff; }
  body.nav-open .site-header { color: #fff; }
}

@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line-strong); }
  .stat { padding: 32px 32px 32px 0; }
  .stat:nth-child(2n) { border-right: 0; padding-left: 32px; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .about-grid, .footer-top { grid-template-columns: minmax(0, 1fr); }
  .about-media, .about-grid--flip .about-media { order: -1; }
  .news-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .stats--3 { grid-template-columns: minmax(0, 1fr); }
  .stats--3 .stat { border-right: 0; border-bottom: 1px solid var(--line); padding-left: 0; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .service-row { grid-template-columns: 56px minmax(0, 1fr) auto; gap: 18px; }
  .service-row__en { display: none; }
  .hero__meta { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .hero { min-height: auto; padding: calc(var(--header-h) + 68px) 0 0; }
  .hero-inner { padding-bottom: 78px; }
  .hero h1 { font-size: 2rem; margin-bottom: 20px; }
  .hero__desc { font-size: 1rem; margin-bottom: 32px; }
  .hero__actions .btn { width: 100%; }
  .marquee__track span { padding: 13px 18px; font-size: 11px; }
  .news-card-grid, .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .news-row { grid-template-columns: minmax(0, 1fr) auto; gap: 14px; }
  .news-row__date { grid-column: 1 / -1; margin-bottom: -6px; }
  .form-grid { grid-template-columns: minmax(0, 1fr); }
  .info-block { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .info-block dt { padding-top: 0; }
  .sec-head { margin-bottom: 34px; }
  .page-hero { padding: calc(var(--header-h) + 54px) 0 56px; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__col > * { opacity: 1; }
  .hero__media img { transform: none; }
}

/* ---------- 小屏精修（确保手机端不错位、不溢出） ---------- */
@media (max-width: 820px) {
  .about-media::before, .about-media::after { display: none; }
  .about-media img { height: clamp(240px, 56vw, 360px); }
  .service-row { padding: 26px 0; }
  .news-card__media img { height: 190px; }
  .article__body { font-size: 15.8px; }
  .cta-inner { gap: 32px; }
  .cta__side { width: 100%; }
  .footer-top { gap: 38px; }
  .value-cell { padding: 26px 22px 26px 0; }
  .value-cell:nth-child(even) { padding-left: 22px; }
}

@media (max-width: 560px) {
  :root { --pad: 18px; --header-h: 68px; --sec: 66px; }
  html { font-size: 15.5px; }
  .brand-mark { width: 32px; height: 32px; }
  .brand-text b { font-size: 17px; }
  .brand-text em { display: none; }
  .hero h1 { font-size: 1.72rem; letter-spacing: -.015em; }
  .hero__eyebrow { letter-spacing: .12em; font-size: 11px; }
  .hero__desc { font-size: .97rem; }
  .btn { height: 48px; }
  .hero__actions { gap: 10px; }
  .marquee__track span { letter-spacing: .12em; }
  .page-hero h1 { font-size: 1.55rem; }
  .page-hero p { font-size: .96rem; }
  .sec-head h2 { font-size: 1.5rem; }
  .about-copy h2 { font-size: 1.45rem; }
  .service-row { grid-template-columns: minmax(0, 1fr) auto; gap: 14px; }
  .service-row__no { display: none; }
  .service-row h3 { font-size: 1.08rem; }
  .service-row p { font-size: 14px; }
  .service-row__go { width: 40px; height: 40px; }
  .stat { padding: 24px 0 !important; }
  .stat__num { font-size: 2.1rem; }
  .stat__num--text { font-size: 1rem; }
  .points li { font-size: 14.5px; }
  .news-row__date { font-size: 12px; }
  .news-row h3 { font-size: 1rem; }
  .news-card__media img { height: 200px; }
  .info-block dd { font-size: 15.5px; word-break: break-word; overflow-wrap: anywhere; }
  .footer-tel { font-size: 1.08rem !important; }
  .footer-bottom { font-size: 12.5px; }
  .footer-meta { gap: 14px; }
  .pager a, .pager span { min-width: 36px; height: 36px; }
  .to-top { width: 42px; height: 42px; }
  .article__head { padding-bottom: 24px; margin-bottom: 28px; }
  .article__meta { gap: 8px 18px; font-size: 11px; }
  .uploader { flex-direction: column; }
}

/* ==========================================================================
   手机端专属排版（≤640px）
   原则：移动端原生节奏 —— 单列信息流、紧凑留白、只保留必要的版权/备案条，
        而不是把电脑端布局缩小后硬塞进小屏
   ========================================================================== */
@media (max-width: 640px) {
  /* --- 垂直节奏：收紧版心留白 --- */
  .section { padding: 46px 0; }
  .sec-head { margin-bottom: 28px; }
  .hero { padding: calc(var(--header-h) + 38px) 0 0; }
  .hero-inner { padding-bottom: 50px; }
  .cta { padding: 48px 0; }
  .page-hero { padding: calc(var(--header-h) + 34px) 0 40px; }

  /* --- 字号层级：主标题略收、区块标题更紧凑 --- */
  .hero h1 { font-size: 1.84rem; line-height: 1.32; }
  .sec-head h2 { font-size: 1.4rem; line-height: 1.35; }
  .sec-head__aside p { margin-bottom: 14px; }

  /* --- 数据指标：2×2 去竖线、保留横向细线，读数更清爽 --- */
  .stat { padding: 20px 0 !important; border-right: 0 !important; }
  .stat:nth-child(2n) { padding-left: 22px !important; }
  .stat__label { margin-top: 10px; letter-spacing: .12em; }

  /* --- 电脑端的双列网格，手机端回归单列 --- */
  .value-grid { grid-template-columns: minmax(0, 1fr); }
  .value-cell, .value-cell:nth-child(odd) { padding: 24px 0; border-right: 0; }
  .value-cell:nth-child(even) { padding-left: 0; }

  /* --- 新闻卡：单列 + 配图略矮 --- */
  .news-card__media img { height: 172px; }

  /* --- 页脚：手机端整块不展示（电脑端保留完整页脚） --- */
  .site-footer { display: none; }
}

/* ==========================================================================
   手机端设计规范（≤640px）
   依据 Apple HIG / Material 触控规范：
   1) 可点击元素不小于 44×44（列表箭头、分页、回到顶部、筛选标签、抽屉入口）
   2) 输入框字号 16px，防止 iOS Safari 聚焦时自动放大页面
   3) 安全区适配（head 已设 viewport-fit=cover），固定元素避开 Home 指示条
   4) 触控反馈：自定义点击高亮 + :active 按压态；UI  chrome 不参与文本选中
   5) 正文 16px 阅读基准，新闻卡配图接近 16:9、内边距与页面 gutter 对齐
   ========================================================================== */
@media (max-width: 640px) {
  /* 触控点击高亮：用品牌蓝的浅色代替系统默认灰块 */
  body { -webkit-tap-highlight-color: rgba(26, 92, 229, .13); }

  /* 去掉部分旧安卓上 300ms 点击延迟；UI chrome 不误选文本 */
  a, button { touch-action: manipulation; }
  .site-nav, .nav-toggle, .btn, .to-top, .pager { user-select: none; -webkit-user-select: none; }

  /* 正文字号回到 16px 阅读基准 */
  body { font-size: 16px; }
  .about-copy .prose { font-size: 16px; }
  .article__body { font-size: 16px; }

  /* 输入框 16px：iOS 聚焦不缩放 */
  .field input, .field textarea, .field select { font-size: 16px; }
  .form-note { font-size: 14.5px; }

  /* 点击目标 ≥ 44px */
  .service-row__go { width: 44px; height: 44px; }
  .news-row__go { width: 44px; height: 44px; }
  .pager a, .pager span { min-width: 44px; height: 44px; }
  .to-top { width: 44px; height: 44px; }
  .btn--sm { height: 44px; }
  .sec-head__main .link-arrow { padding: 10px 2px; }
  .site-nav .nav-phone { padding: 12px 20px; }

  /* 按压反馈（触控即时响应） */
  .btn:active { transform: scale(.97); }
  .news-card:active { transform: scale(.99); }
  .service-row__go:active, .news-row__go:active, .to-top:active, .pager a:active {
    background: var(--blue); border-color: var(--blue); color: #fff;
  }
  .link-arrow:active { color: var(--blue); }
  .nav-link:active { color: var(--sky); }

  /* 新闻卡：配图接近 16:9，内边距与页面 gutter 对齐 */
  .news-card__media img { height: 200px; }
  .news-card h3 { padding: 18px 18px 0; }
  .news-card p { padding: 0 18px 10px; }
  .news-card__meta { padding: 8px 18px 14px; }

  /* 主行动按钮全宽，拇指热区 */
  .cta__side .btn { width: 100%; }

  /* 安全区：回到顶部避开 Home 指示条（页脚在手机端已整块隐藏，无需留安全区） */
  .to-top {
    right: calc(16px + env(safe-area-inset-right));
    bottom: calc(16px + env(safe-area-inset-bottom));
  }
}