/* ============================================================
 * 上海经纬旷世数据服务有限公司 — 官网 Demo
 * 视觉规范参照 GDS 官网：深红/金色/深灰蓝、白底大页头、
 * 金色描边按钮、深色页脚。本样式为独立实现。
 * ============================================================ */
:root {
  --red: #bd1b21;
  --gold: #a37b1f;
  --gold-bright: #e7a100;
  --dark: #1f252f;
  --text: #58595b;
  --text-light: #bcbec0;
  --text-mute: #818284;
  --line: #dddedf;
  --line2: #cdcfd0;
  --bg-gray: #eeeeee;
  --green: #00654d;
  --w: 1230px;
  --pad-x: 100px;
  --font: "WhitneySC", "Whitney", "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); color: var(--text); background: #fff; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img, svg { vertical-align: middle; border: none; }
h1, h2, h3, h4 { font-weight: normal; }

/* ---------- 通用按钮（描边式） ---------- */
.btn {
  display: block; max-width: 260px; height: 60px; margin: 0 auto; padding: 0;
  font-size: 16px; letter-spacing: 1px; text-transform: uppercase; font-family: var(--font);
  line-height: 56px; text-align: center; border: 2px solid; border-radius: 2px;
  background: none; cursor: pointer;
  transition: opacity .2s;
}
.btn:hover { opacity: .82; }
.btn-gold  { color: var(--gold); border-color: var(--gold); }
.btn-goldb { color: var(--gold-bright); border-color: var(--gold-bright); }
.btn-red   { color: var(--red); border-color: var(--red); }
.btn-green { color: var(--green); border-color: var(--green); }
.btn-white { color: #fff; border-color: #fff; }
.btn-left  { margin-left: 0; }

/* ---------- 页头 ---------- */
.site-header { width: 100%; background: #fff; position: relative; z-index: 1000; }
.container { max-width: var(--w); margin: 0 auto; padding: 0 var(--pad-x); }
.header-inner {
  max-width: var(--w); margin: 0 auto; padding: 0 var(--pad-x);
  height: 100px; display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; }
.logo img { width: 180px; height: auto; display: block; }

.main-nav { display: flex; align-items: center; flex: 1; justify-content: flex-end; }
.main-nav > ul { display: flex; flex: 1; }
.main-nav > ul > li { position: relative; background: #fff; }
.main-nav > ul > li > a {
  display: block; padding: 0 24px; line-height: 100px;
  font-size: 15px; color: var(--text); white-space: nowrap;
}
.main-nav > ul > li > a:hover,
.main-nav > ul > li > a.current { color: #fff; background: var(--red); }

/* 下拉面板 */
.sub-panel {
  display: none; position: absolute; top: 100px; left: 50%; transform: translateX(-50%);
  background: var(--dark); padding: 30px 0; z-index: 999; white-space: nowrap;
}
.main-nav li:hover .sub-panel { display: block; }
.sub-col { display: inline-block; vertical-align: top; }
.sub-col h4 {
  font-size: 13px; color: var(--gold); font-weight: bold;
  margin: 10px 30px 20px; text-transform: uppercase;
}
.sub-col a {
  display: block; font-size: 14px; color: var(--text-light);
  line-height: 35px; padding: 0 30px;
}
.sub-col a:hover { color: #fff; }

/* 语言切换（导航最后一项） */
.lang-item > a { cursor: pointer; }
.lang-item .lang-tag {
  display: inline-block; font-size: 13px; border: 1px solid var(--line2);
  padding: 4px 10px; line-height: 1; margin-left: 8px; border-radius: 2px;
}
.main-nav { margin-left: 60px; }
.main-nav > ul > li.lang-item { margin-left: 14px; background: transparent; align-self: center; }
.main-nav > ul > li.lang-item > a { display: flex; align-items: center; height: 100%; padding: 0 6px; }
.main-nav > ul > li.lang-item > a .lang-tag { margin-left: 0; border: none; padding: 0; font-size: 0; line-height: 0; }
.lang-tag .flag { width: 22px; height: 14px; display: block; border-radius: 2px; box-shadow: 0 0 0 1px rgba(0,0,0,.15); object-fit: cover; }
.main-nav > ul > li.lang-item > a:hover { background: none; color: var(--red); }
.main-nav > ul > li.lang-item > a:hover .lang-tag { border-color: var(--red); }

/* 移动端汉堡 */
.nav-toggle {
  display: none; width: 44px; height: 44px; background: none;
  border: 1px solid var(--line2); border-radius: 2px; cursor: pointer; padding: 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--dark); margin: 5px 0; }

/* ---------- Hero（首屏大图） ---------- */
.hero {
  height: 500px; position: relative; display: flex; align-items: center; justify-content: center;
  text-align: center;
  background: #060b16;
  overflow: hidden;
}
.hero::before{
  content:'';
  position:absolute;
  inset:-12%;
  background:url('../img/bg/circuit-dynamic.jpg') center/cover no-repeat;
  animation:dynpan 16s ease-in-out infinite alternate;
  filter:saturate(1.6) brightness(1.25) contrast(1.1);
  will-change:transform,filter;
  z-index:0;
}
.hero::after{
  content:'';
  position:absolute;
  inset:0;
  background:
    linear-gradient(115deg, transparent 32%, rgba(80,160,255,.16) 46%, rgba(212,175,55,.20) 52%, transparent 68%),
    radial-gradient(640px 320px at 72% 38%, rgba(64,130,255,.30), transparent 70%),
    radial-gradient(520px 300px at 22% 75%, rgba(212,175,55,.20), transparent 70%),
    linear-gradient(180deg,rgba(4,9,20,.78),rgba(4,9,20,.60) 45%,rgba(4,9,20,.82));
  background-size:260% 100%,140% 140%,140% 140%,100% 100%;
  background-position:180% 0,center,center,center;
  animation:dynsweep 8s linear infinite, dynglow 5s ease-in-out infinite alternate;
  z-index:1;
}
.hero-content{ position:relative; z-index:2; }
@media (prefers-reduced-motion:reduce){
  .hero::before,.hero::after{ animation:none; }
}
.hero-content { max-width: 700px; padding: 0 30px; }
.hero-eyebrow {
  font-size: 44px; color: var(--gold-bright); letter-spacing: 10px; word-break: normal;
}
.hero-title { font-size: 28px; color: #fff; line-height: 42px; margin-top: 35px; }
.hero .btn { margin-top: 110px; }
.feature-banner .hero-content .btn { margin-top: 110px; }

/* ---------- 数据带（5 等分方格） ---------- */
.stats-band { width: 100%; background: var(--bg-gray); }
.stats-inner { max-width: var(--w); margin: 0 auto; padding: 0 75px; }
.stats-inner ul { display: grid; grid-template-columns: repeat(5, 1fr); }
.stats-inner li { border-right: 2px solid var(--line); }
.stats-inner li:first-child { border-left: 2px solid var(--line); }
.stat-cell {
  aspect-ratio: 1 / 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 10px;
}
.stat-num { font-size: 20px; color: var(--gold); line-height: 40px; }
.stat-label { font-size: 20px; color: var(--text); line-height: 25px; }
/* 四项能力带 */
.stats-cap ul { grid-template-columns: repeat(4, 1fr); }
.stats-cap .stat-num { font-size: 22px; color: var(--gold); font-weight: 500; line-height: 30px; }
.stats-cap .stat-label { font-size: 20px; color: var(--text); line-height: 30px; }
@media (max-width: 760px){
  .stats-cap ul { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 特性大图（第二屏 banner） ---------- */
.feature-banner {
  height: 500px; display: flex; align-items: center; justify-content: center; text-align: center;
  position: relative; overflow: hidden; background: #060b16;
}
.feature-banner::before{
  content:'';
  position:absolute;
  inset:-12%;
  background:url('../img/bg/datacenter-dynamic.jpg') center/cover no-repeat;
  animation:dynpan 16s ease-in-out infinite alternate;
  filter:saturate(1.6) brightness(1.25) contrast(1.1);
  will-change:transform,filter;
  z-index:0;
}
.feature-banner::after{
  content:'';
  position:absolute;
  inset:0;
  background:
    linear-gradient(115deg, transparent 32%, rgba(80,160,255,.14) 46%, rgba(212,175,55,.18) 52%, transparent 68%),
    radial-gradient(640px 320px at 30% 60%, rgba(64,130,255,.26), transparent 70%),
    radial-gradient(520px 300px at 78% 30%, rgba(212,175,55,.18), transparent 70%),
    linear-gradient(180deg,rgba(4,9,20,.80),rgba(4,9,20,.62) 45%,rgba(4,9,20,.82));
  background-size:260% 100%,140% 140%,140% 140%,100% 100%;
  background-position:180% 0,center,center,center;
  animation:dynsweep 8s linear infinite, dynglow 5s ease-in-out infinite alternate;
  z-index:1;
}
.feature-banner .hero-content{ position:relative; z-index:2; }
@media (prefers-reduced-motion:reduce){
  .feature-banner::before,.feature-banner::after{ animation:none; }
}
.feature-banner .hero-content { max-width: 760px; }
.fb-svc::before{
  background-image:url('../img/bg/datalight-dynamic.jpg');
}

/* ---------- 图文左右分栏 ---------- */
.split { width: 100%; background: var(--bg-gray); }
.split-inner {
  max-width: var(--w); margin: 0 auto; padding: 65px var(--pad-x);
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.split.rev .split-inner > .split-media { order: 2; }
.split-media { text-align: center; }
.split-media svg { width: 100%; max-width: 294px; height: auto; }
.split-body h2 { font-size: 40px; color: var(--dark); line-height: 75px; }
.split-body p { font-size: 18px; color: var(--text); line-height: 35px; margin-top: 10px; padding-right: 10%; }
.split-body p.sv-int { padding-right: 15%; }
.split-body .btn { margin: 40px 0 0; }
.plist { margin-top: 22px; list-style: none; }
.plist li { padding: 11px 0; border-bottom: 1px dashed #d8d8d8; font-size: 15px; line-height: 26px; color: var(--text); }
.plist li:last-child { border-bottom: none; }
.plist li strong { display: block; color: var(--dark); font-size: 17px; font-weight: 700; margin-bottom: 3px; }
.plist li strong::before { content: '■'; color: var(--gold); font-size: 11px; margin-right: 9px; vertical-align: 2px; }
#sv1-detail { padding: 80px 0 40px; }
#sv1-detail .sec-desc { max-width: 860px; }
.pl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.pl-card { background: #fff; border: 1px solid #e5e5e5; border-top: 3px solid var(--red); padding: 28px 26px 26px; }
.pl-card h4 { font-size: 20px; color: var(--dark); margin-bottom: 12px; }
.pl-card p { font-size: 15px; line-height: 27px; color: var(--text); }
.st-h { margin-top: 70px; }
.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px 40px; margin-top: 36px; }
.tech-item h4 { font-size: 17px; color: var(--dark); margin-bottom: 8px; padding-left: 14px; border-left: 3px solid var(--gold); }
.tech-item p { font-size: 14px; line-height: 25px; color: var(--text); }
/* Pure Storage 风格 */
.ps-hero { background: #14161a; padding: 110px 0 120px; text-align: center; }
.ps-hero h2 { font-size: 58px; color: #fff; font-weight: 800; letter-spacing: -0.5px; line-height: 1.12; margin: 0; }
.ps-hero p { font-size: 18px; color: #aeb4bd; line-height: 32px; margin: 24px auto 0; max-width: 760px; }
.kicker { display: block; font-size: 13px; font-weight: 800; letter-spacing: 4px; text-transform: uppercase; color: var(--gold-bright); margin-bottom: 14px; }
.ps-center { text-align: center; }
.ps-center .sec-title::after { margin-left: auto; margin-right: auto; }
.ps-center .sec-desc { margin-left: auto; margin-right: auto; max-width: 900px; }
.ps-card { border-top: 3px solid transparent; text-align: left; }
.ps-card:hover { border-top-color: var(--gold-bright); }
.ps-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.ps-card { background: #fff; border: 1px solid #ececec; border-radius: 6px; padding: 34px 30px 30px; display: flex; flex-direction: column; transition: box-shadow .25s, transform .25s; }
.ps-card:hover { box-shadow: 0 14px 36px rgba(0,0,0,.10); transform: translateY(-3px); }
.ps-card h4 { font-size: 21px; color: var(--dark); font-weight: 800; margin-bottom: 12px; letter-spacing: -0.3px; }
.ps-card p { font-size: 15px; line-height: 26px; color: #5c636c; flex: 1; }
.ps-card a { margin-top: 18px; font-size: 15px; font-weight: 700; color: var(--red); text-decoration: none; }
.ps-card a::after { content: ' →'; }
.ps-card a:hover { color: var(--gold); }
.ps-alt { background: #fff; }
@media screen and (max-width: 960px) {
  .ps-cards { grid-template-columns: 1fr; }
  .ps-hero h2 { font-size: 34px; }
  .ps-hero { padding: 60px 0 70px; }
}

/* ---------- 红色快捷图标带 ---------- */
.quick-links { width: 100%; background: var(--red); }
.quick-links ul { display: flex; justify-content: center; flex-wrap: wrap; max-width: var(--w); margin: 0 auto; }
.quick-links a {
  display: block; padding: 55px 70px; text-align: center; color: #fff; transition: background .2s;
}
.quick-links a:hover { background: rgba(0,0,0,.08); }
.quick-links svg { width: 58px; height: 58px; display: block; margin: 0 auto; }
.quick-links .q-label { display: block; font-size: 20px; line-height: 24px; padding-top: 22px; }

/* ---------- 信息三栏（新闻/公告/运营数据） ---------- */
.info-strip { width: 100%; background: #fff; }
.info-inner { max-width: var(--w); margin: 0 auto; padding: 100px var(--pad-x); display: grid; grid-template-columns: 1fr 1fr; }
.info-col .col-title { font-size: 22px; color: var(--text); line-height: 30px; height: 80px; }
.info-item { position: relative; padding-left: 30px; margin-bottom: 6px; }
.info-item::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 14px; height: 14px; background: var(--gold);
}
.info-item .name { font-size: 22px; color: var(--dark); line-height: 30px; }
.info-item .date { font-size: 14px; color: var(--text); line-height: 22px; }
.info-col.data-col { border-left: 2px solid var(--line2); padding-left: 12%; }
.data-figure { font-size: 36px; color: var(--gold); line-height: 30px; padding-left: 30px; }
.data-sub { font-size: 18px; color: var(--gold); line-height: 28px; margin-top: 30px; padding-left: 30px; }
.data-time { font-size: 14px; color: var(--text); line-height: 30px; margin-top: 12px; padding-left: 30px; }

/* ---------- 页脚 ---------- */
.site-footer { width: 100%; background: var(--dark); }
.footer-inner { max-width: var(--w); margin: 0 auto; padding: 40px var(--pad-x); }
.f-cols { display: grid; grid-template-columns: repeat(4, 1fr); }
.f-col h4 { font-size: 13px; color: var(--gold); font-weight: bold; line-height: 55px; text-transform: uppercase; }
.f-col a { display: block; font-size: 14px; color: var(--text-light); line-height: 30px; }
.f-col a:hover { color: #fff; }
.f-lang { margin-top: 35px; text-align: right; }
.f-lang button {
  background: none; border: 1px solid var(--line2); color: var(--line2);
  font-size: 14px; padding: 5px 14px; cursor: pointer; border-radius: 2px; font-family: var(--font);
}
.f-lang button:hover, .f-lang button.on { color: #fff; border-color: #fff; }
.f-bottom { margin-top: 10px; }
.f-bottom p { font-size: 13px; color: var(--text-mute); line-height: 24px; }
.f-bottom em { font-style: normal; margin: 0 12px; color: var(--gold); }

/* ---------- 内页通用 ---------- */
.page-banner {
  height: 300px; display: flex; align-items: center; justify-content: center; text-align: center;
  background:
    linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)),
    url(../img/banner-office.jpg) center 35%/cover no-repeat,
    radial-gradient(900px 400px at 60% 30%, #2d3846 0%, #171b23 62%);
}
.page-banner .eyebrow { font-size: 20px; color: var(--gold-bright); letter-spacing: 8px; text-transform: uppercase; }
.page-banner h1 { font-size: 34px; color: #fff; margin-top: 18px; }
.page-sec { padding: 70px 0; }
.page-sec.gray { background: var(--bg-gray); }
.sec-inner { max-width: var(--w); margin: 0 auto; padding: 0 var(--pad-x); }
.sec-title { font-size: 34px; color: var(--dark); line-height: 60px; }
.sec-desc { font-size: 18px; color: var(--text); line-height: 35px; margin-top: 14px; }
.dc-intro { font-size: 23px; color: var(--gold); font-weight: 500; }

/* 典型客户 logo 墙 */
.client-logos { display: grid; grid-template-columns: repeat(2, 1fr); align-items: center; justify-items: center; gap: 26px 16px; margin-top: 18px; }
.client-logos img { height: 26px; width: auto; max-width: 115px; object-fit: contain; opacity: .9; transition: opacity .2s, transform .2s; }
.client-logos img:hover { opacity: 1; transform: translateY(-2px); }

/* 招聘职位卡片 */
.job-card { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--gold); padding: 32px 34px; margin-top: 28px; }
.job-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.job-card h3 { font-size: 21px; color: var(--dark); }
.job-tag { font-size: 13px; color: var(--gold); border: 1px solid var(--gold); border-radius: 20px; padding: 4px 14px; }
.job-card h4 { font-size: 15px; color: var(--gold); margin: 18px 0 8px; letter-spacing: 1px; }
.job-list { margin: 0; padding-left: 20px; }
.job-list li { font-size: 14.5px; color: var(--text); line-height: 28px; }
.job-mail { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); font-size: 14.5px; color: var(--text); }
.job-mail a { color: var(--gold); font-weight: bold; }
.job-mail a:hover { color: var(--red); }

/* 资质认证证书列表 */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 28px; }
.cert-card { margin: 0; background: #fff; border: 1px solid var(--line); padding: 12px 12px 14px; display: flex; flex-direction: column; transition: box-shadow .2s, transform .2s; }
.cert-card:hover { box-shadow: 0 8px 22px rgba(0,0,0,.1); transform: translateY(-3px); }
.cert-card a { display: flex; align-items: flex-start; justify-content: center; height: auto; }
.cert-card img { width: 100%; height: auto; display: block; }
.cert-card figcaption { margin-top: 12px; font-size: 13.5px; color: var(--text); line-height: 20px; text-align: center; }
.sec-title::after { content: ""; display: block; width: 46px; height: 3px; background: var(--red); margin-top: 14px; }

/* 时间线 */
.timeline { margin-top: 40px; border-left: 2px solid var(--line); }
.tl-item { position: relative; padding: 0 0 34px 34px; }
.tl-item::before {
  content: ""; position: absolute; left: -7px; top: 6px; width: 12px; height: 12px;
  background: #fff; border: 2px solid var(--gold); border-radius: 50%;
}
.tl-year { font-size: 20px; color: var(--gold); line-height: 34px; }
.tl-title { font-size: 18px; color: var(--dark); line-height: 30px; }
.tl-desc { font-size: 15px; color: var(--text); line-height: 28px; margin-top: 4px; }

/* 认证/资质 标签网格 */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; }
.cert-chip {
  border: 2px solid var(--line); background: #fff; padding: 26px 22px;
  font-size: 17px; color: var(--dark); line-height: 26px; text-align: center;
}
.cert-chip span { display: block; font-size: 13px; color: var(--gold); margin-top: 6px; letter-spacing: 1px; text-transform: uppercase; }

/* 数据中心区域卡 */
.region-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 40px; }
.region-card { background: #fff; border: 2px solid var(--line); }
.region-card .rc-head {
  background: var(--dark); color: #fff; padding: 18px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.region-card .rc-head .rc-name { font-size: 20px; }
.region-card .rc-head .rc-cities { font-size: 13px; color: var(--gold-bright); }
.region-card .rc-body { padding: 20px 24px; font-size: 15px; color: var(--text); line-height: 30px; }
.rc-body li { padding-left: 18px; position: relative; }
.rc-body li::before { content: ""; position: absolute; left: 0; top: 12px; width: 7px; height: 7px; background: var(--gold); }

/* 列表页新闻条目 */
.news-list { margin-top: 40px; }
.news-row { display: flex; align-items: baseline; gap: 18px; padding: 22px 0; border-bottom: 2px solid var(--line); }
.news-row .n-date { flex: 0 0 110px; font-size: 15px; color: var(--gold); }
.news-row .n-title { font-size: 19px; color: var(--dark); line-height: 30px; }
.news-row .n-cat { margin-left: auto; flex: 0 0 auto; font-size: 13px; color: var(--text); border: 1px solid var(--line2); padding: 3px 10px; border-radius: 2px; }

/* ESG 数据三格 */
.esg-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.esg-cell { background: #fff; border-top: 3px solid var(--gold); border-bottom: 2px solid var(--line); padding: 34px 26px; text-align: center; }
.esg-cell .v { font-size: 40px; color: var(--gold); line-height: 48px; }
.esg-cell .k { font-size: 17px; color: var(--text); margin-top: 10px; }

/* 联系页 */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.35fr; gap: 40px; margin-top: 32px; align-items: start; }
.contact-info { display: flex; flex-direction: column; justify-content: flex-start; padding-top: 12px; }
.contact-info h3 {
  font-size: 14px; color: var(--dark); margin: 30px 0 10px;
  padding-left: 12px; position: relative; line-height: 22px;
}
.contact-info h3:first-child { margin-top: 0; }
.contact-info h3::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 5px; height: 10px; background: var(--gold);
}
.contact-info p { font-size: 13px; color: var(--text); line-height: 22px; padding-left: 12px; }

.contact-form { background: #fff; border: 1px solid var(--line); padding: 20px 28px 18px; }
.contact-form .cols { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.contact-form .row { margin-bottom: 6px; }
.contact-form label {
  display: block; font-size: 13px; color: var(--dark);
  margin-bottom: 4px; letter-spacing: .5px;
}
.contact-form input, .contact-form textarea {
  width: 100%; height: 30px; border: 1px solid var(--line2); border-radius: 2px;
  padding: 0 10px; font-size: 13px; font-family: var(--font); color: var(--dark);
  background: #fff; transition: border-color .2s;
}
.contact-form textarea { height: 52px; padding: 6px 10px; resize: vertical; line-height: 18px; }
.contact-form input:focus, .contact-form textarea:focus { border-color: var(--gold); outline: none; }
.contact-form ::placeholder { color: #bcbec0; }
.contact-form .err { display: none; font-size: 13px; color: var(--red); margin-top: 8px; }
.contact-form .invalid input, .contact-form .invalid textarea { border-color: var(--red); }
.contact-form .invalid .err { display: block; }
.btn-submit {
  display: block; width: auto; min-width: 120px; height: 34px; padding: 0 32px; margin-top: 5px;
  background: var(--red); color: #fff; border: none; border-radius: 2px;
  font-size: 13px; letter-spacing: 5px; font-family: var(--font);
  cursor: pointer; transition: background .2s;
}
.btn-submit:hover { background: #9f151b; }
.form-tip { display: none; margin-top: 20px; font-size: 15px; color: var(--green); }
.form-tip.show { display: block; }

/* 价值卡（加入我们） */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.sec-lead { font-size: 23px; color: var(--gold); font-weight: 500; line-height: 38px; max-width: 1000px; margin-bottom: 8px; }

/* 新闻文章正文 */
.news-article { margin-top: 44px; max-width: 900px; }
.news-article .na-title { font-size: 21px; color: var(--dark); line-height: 32px; margin: 40px 0 6px; padding-top: 34px; border-top: 1px solid var(--line); }
.news-article .na-title:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.news-article .na-date { font-size: 13px; color: #939598; margin-bottom: 18px; }
.news-article p { font-size: 15px; color: var(--text); line-height: 32px; margin-bottom: 18px; text-align: justify; }
.news-article h3 { font-size: 19px; color: var(--dark); margin: 30px 0 14px; padding-left: 12px; position: relative; }
.news-article h3::before { content: ""; position: absolute; left: 0; top: 6px; width: 5px; height: 14px; background: var(--gold); }

/* 新闻中心（参照 GDS）：子导航 tab + 最新动态列表 */
.news-tabs { display: flex; gap: 48px; border-bottom: 2px solid var(--line); margin-bottom: 8px; }
.news-tabs a {
  font-size: 17px; color: var(--text); padding: 14px 4px; letter-spacing: 1px;
  border-bottom: 3px solid transparent; margin-bottom: -2px; cursor: pointer;
}
.news-tabs a.active { color: var(--red); border-bottom-color: var(--red); font-weight: 600; }
.gnews-list { display: none; }
.gnews-list.show { display: block; }
.gnews-item { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; padding: 26px 4px; border-bottom: 1px solid var(--line); }
.gnews-main { flex: 1; }
.gnews-main h3 { font-size: 18px; line-height: 28px; margin-bottom: 10px; }
.gnews-main h3 a { color: var(--dark); }
.gnews-main h3 a:hover { color: var(--red); }
.gnews-sum { font-size: 14px; color: var(--text); line-height: 24px; }
.gnews-date { font-size: 14px; color: #939598; white-space: nowrap; padding-top: 4px; }

/* 最新动态（图文列表，参照 GDS） */
.lt-head { text-align: center; margin: 26px 0 46px; }
.lt-head h2 { font-size: 34px; color: var(--gold); letter-spacing: 4px; font-weight: 600; }
.lt-line { display: block; width: 56px; height: 3px; background: var(--gold); margin: 18px auto 0; }
.lnews-list { max-width: 1000px; margin: 0 auto; }
.lnews-item { display: flex; gap: 34px; align-items: flex-start; padding: 30px 0; border-bottom: 1px solid var(--line); }
.lnews-thumb { flex: 0 0 260px; }
.lnews-thumb img { display: block; width: 260px; height: 150px; object-fit: cover; }
.lnews-main { flex: 1; }
.lnews-main h3 { font-size: 19px; line-height: 30px; margin-bottom: 12px; }
.lnews-main h3 a { color: var(--dark); }
.lnews-main h3 a:hover { color: var(--red); }
.lnews-sum { font-size: 14px; color: var(--text); line-height: 26px; margin-bottom: 14px; }
.lnews-date { display: flex; align-items: center; gap: 7px; font-size: 13px; color: #939598; }
.lnews-date .clock { color: var(--gold); }
.value-card { background: #fff; border: 2px solid var(--line); padding: 34px 28px; }
.value-card h3 { font-size: 20px; color: var(--dark); }
.value-card h3::after { content: ""; display: block; width: 34px; height: 3px; background: var(--gold); margin-top: 12px; }
.value-card p { font-size: 15px; color: var(--text); line-height: 30px; margin-top: 14px; }

/* 揭示动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* 锚点偏移与双栏 */
[id] { scroll-margin-top: 96px; }
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; margin-top: 40px; }

/* ---------- 响应式 ---------- */
@media screen and (max-width: 1345px) {
  :root { --pad-x: 80px; }
  .main-nav > ul > li > a { padding: 0 15px; }
}
@media screen and (max-width: 1230px) {
  :root { --pad-x: 50px; }
  .stats-inner { padding: 0 50px; }
}
@media screen and (max-width: 1120px) {
  .stats-inner ul { grid-template-columns: 1fr; }
  .stats-inner li, .stats-inner li:first-child { border: none; border-top: 1px solid var(--line); }
  .stat-cell { aspect-ratio: auto; padding: 26px 10px; }
  .quick-links ul { flex-direction: column; }
  .quick-links a { padding: 34px 70px; }
  .info-inner { grid-template-columns: 1fr; gap: 40px; }
  .info-col.data-col { border-left: none; padding-left: 0; }
  .data-figure, .data-sub, .data-time { padding-left: 0; }
  .split-body p { padding-right: 0; }
}
@media screen and (max-width: 960px) {
  :root { --pad-x: 30px; }
  .header-inner { height: 80px; }
  .pl-grid, .tech-grid { grid-template-columns: 1fr; }
  .st-h { margin-top: 50px; }
  .logo img { width: 140px; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 80px; left: 0; width: 100%;
    background: #fff; box-shadow: 0 12px 24px rgba(0,0,0,.12);
  }
  .main-nav.open { display: block; }
  .main-nav > ul { display: block; }
  .main-nav > ul > li { background: none; border-top: 1px solid var(--line); }
  .main-nav > ul > li > a { line-height: 50px; padding: 0 30px; }
  .sub-panel {
    display: block !important; position: static; transform: none;
    background: #f6f6f6; padding: 6px 0 14px; white-space: normal;
  }
  .sub-col h4 { margin: 10px 30px 6px; }
  .sub-col a { padding: 0 30px; line-height: 32px; }
  .hero { height: 560px; }
  .hero-eyebrow { font-size: 36px; letter-spacing: 6px; }
  .split-inner { grid-template-columns: 1fr; gap: 30px; padding: 40px var(--pad-x); }
  .split.rev .split-inner > .split-media { order: 0; }
  .split-body h2 { line-height: 46px; }
  .region-grid, .cert-grid, .esg-grid, .value-grid { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; gap: 24px; }
  .contact-form { padding: 20px 16px 18px; }
  .contact-form .cols { grid-template-columns: 1fr; gap: 0; }
  .duo { grid-template-columns: 1fr; gap: 34px; }
  .f-cols { grid-template-columns: 1fr 1fr; gap: 8px 20px; }
  .info-inner { padding: 60px var(--pad-x); }
  .sec-inner { padding: 0 var(--pad-x); }
  .stats-inner { padding: 0 var(--pad-x); }
}
@media screen and (max-width: 560px) {
  .hero-eyebrow { font-size: 30px; }
  .hero-title { font-size: 22px; line-height: 36px; }
  .split-body h2, .sec-title { font-size: 28px; line-height: 44px; }
  .f-cols { grid-template-columns: 1fr; }
  .quick-links a { padding: 28px 30px; }
  .news-row { flex-wrap: wrap; }
  .news-row .n-cat { margin-left: 128px; }
}

/* 新闻详情返回链接 */
.news-article .na-back { margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--line); }
.news-article .na-back a { color: var(--red); font-size: 14px; text-decoration: none; }
.news-article .na-back a:hover { color: var(--gold); }
.news-article img { max-width: 100%; height: auto; display: block; margin: 10px auto; }
.news-article ul { margin: 0 0 18px 22px; }
.news-article ul li { font-size: 15px; color: var(--text); line-height: 32px; }

/* ---------- 各栏目专属横幅背景 ---------- */
.page-banner.pb-about { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-about.jpg?v=2) center 35%/cover no-repeat; }
.page-banner.pb-products { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-products.jpg) center 35%/cover no-repeat; }
.page-banner.pb-solutions { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-solutions.jpg) center 35%/cover no-repeat; }
.page-banner.pb-services { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-services.jpg) center 35%/cover no-repeat; }
.page-banner.pb-support { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-support.jpg) center 35%/cover no-repeat; }
.page-banner.pb-partners { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-partners.jpg) center 20%/cover no-repeat; }
.page-banner.pb-news { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-news.jpg) center 35%/cover no-repeat; }
.page-banner.pb-sustainability { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-sustainability.jpg) center 35%/cover no-repeat; }
.page-banner.pb-join { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-join.jpg) center 35%/cover no-repeat; }
.page-banner.pb-ir { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-about.jpg?v=2) center 35%/cover no-repeat; }

.page-banner.pb-contact { background: linear-gradient(rgba(23,27,35,.55), rgba(23,27,35,.55)), url(../img/banner-contact.jpg) center 35%/cover no-repeat; }

/* ---------- 以人为本页面 ---------- */
.pp-card { flex: 1 1 280px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--gold); padding: 30px 26px; }
.pp-card h3 { font-size: 19px; color: var(--dark); margin-bottom: 12px; }
.pp-card p { font-size: 14.5px; color: var(--text); line-height: 28px; }
.btn-gold { display: inline-block; background: var(--gold); color: #fff; font-size: 15px; padding: 14px 46px; letter-spacing: 2px; }
.btn-gold:hover { background: var(--red); }

/* 页脚国旗语言按钮：右下角绝对定位，与版权行对齐 */
.footer-inner { position: relative; }
.f-lang { position: absolute; right: calc(var(--pad-x) + 4vw); bottom: 136px; margin: 0; display: flex; flex-direction: row; gap: 6px; }
.f-lang button { width: 25px; height: 15px; padding: 0; display: flex; align-items: center; justify-content: center; overflow: hidden; border-radius: 2px; }
.f-lang .flag-btn { width: 100%; height: 100%; display: block; object-fit: cover; }

/* ===== 动态科技背景（电路板光效） ===== */
.dyn-bg{
  position:relative;
  overflow:hidden;
  background:#060b16;
}
.dyn-bg::before{
  content:'';
  position:absolute;
  inset:-12%;
  background:url('../img/bg/circuit-dynamic.jpg') center/cover no-repeat;
  animation:dynpan 16s ease-in-out infinite alternate;
  filter:saturate(1.6) brightness(1.25) contrast(1.1);
  will-change:transform,filter;
  z-index:0;
}
.dyn-bg::after{
  content:'';
  position:absolute;
  inset:0;
  background:
    linear-gradient(115deg, transparent 32%, rgba(80,160,255,.14) 46%, rgba(212,175,55,.18) 52%, transparent 68%),
    radial-gradient(640px 320px at 72% 38%, rgba(64,130,255,.26), transparent 70%),
    radial-gradient(520px 300px at 22% 75%, rgba(212,175,55,.18), transparent 70%),
    linear-gradient(180deg,rgba(4,9,20,.84),rgba(4,9,20,.66) 45%,rgba(4,9,20,.84));
  background-size:260% 100%,140% 140%,140% 140%,100% 100%;
  background-position:180% 0,center,center,center;
  animation:dynsweep 8s linear infinite, dynglow 5s ease-in-out infinite alternate;
  z-index:1;
}
.dyn-bg .sec-inner{
  position:relative;
  z-index:2;
}
.dyn-bg .sec-title,
.dyn-bg .sec-lead{
  color:var(--gold);
}
.dyn-bg .pp-card,
.dyn-bg .region-card{
  background:rgba(10,18,34,.82);
  border-color:rgba(212,175,55,.35);
  backdrop-filter:blur(4px);
}
@keyframes dynpan{
  0%   { transform:scale(1)   translate(0,0); filter:saturate(1.5) brightness(1.2); }
  50%  { transform:scale(1.1) translate(-2%,1.5%); filter:saturate(1.8) brightness(1.35); }
  100% { transform:scale(1)   translate(2%,-1.5%); filter:saturate(1.5) brightness(1.2); }
}
@keyframes dynsweep{
  0%   { background-position:180% 0, center, center, center; }
  100% { background-position:-120% 0, center, center, center; }
}
@keyframes dynglow{
  0%   { opacity:.65; }
  100% { opacity:1; }
}
@media (prefers-reduced-motion:reduce){
  .dyn-bg::before,.dyn-bg::after{ animation:none; }
}

/* 产品/服务链接条目 */
.plinks a { color: inherit; text-decoration: none; border-bottom: 1px dashed rgba(189,27,33,.5); transition: color .2s, border-color .2s; cursor: pointer; }
.plinks a:hover { color: var(--gold); border-bottom-color: var(--gold); }

/* 表单成功页 */
.form-success { text-align: center; padding: 70px 30px; }
.form-success .fs-check { width: 64px; height: 64px; line-height: 64px; margin: 0 auto 20px; border-radius: 50%; background: #0a7d43; color: #fff; font-size: 32px; font-weight: 700; }
.form-success h3 { font-size: 26px; color: var(--dark); margin-bottom: 10px; }
.form-success p { font-size: 16px; color: var(--text); line-height: 28px; }

/* 产品线平台分组标题 */
.pl-group{margin:44px 0 20px;font-size:22px;font-weight:700;color:#14161a;text-align:center;position:relative;padding-bottom:14px;}
.pl-group::after{content:'';position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:56px;height:3px;background:#c9a04e;border-radius:2px;}