/* =========================================================
   CONCO 官网 v3 — HashiCorp 明暗双模设计系统
   参考：awesome-design-md / references/hashicorp.md
   强调色：匡谷印章红（唯一彩色）
   ========================================================= */

@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/harmonyos-sc-bold.woff2") format("woff2");
  font-weight: 700; font-display: swap;
}
@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../fonts/harmonyos-sc-medium.woff2") format("woff2");
  font-weight: 500; font-display: swap;
}

:root {
  /* 双模底色 */
  --c-dark: #15181e;
  --c-darker: #0d0e12;
  --c-white: #ffffff;
  --c-light: #f1f2f3;
  /* 文字 */
  --c-ink: #000000;
  --c-body: #3b3d45;
  --c-helper: #656a76;
  --c-ondark: #efeff1;
  --c-ondark-sub: #d5d7db;
  /* 印章红（唯一强调色） */
  --c-red: #d92b2b;
  --c-red-deep: #b31f1f;
  --c-red-ondark: #ff5c5c;
  /* 边框 */
  --bd-light: rgba(178, 182, 189, 0.4);
  --bd-dark: rgb(97, 104, 117);
  /* 阴影（whisper 级） */
  --sh: rgba(97,104,117,.05) 0 1px 1px, rgba(97,104,117,.05) 0 2px 2px;
  /* 字体 */
  --font: system-ui, -apple-system, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Helvetica, Arial, sans-serif;
  --font-title: "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  /* 圆角 */
  --r-btn: 5px; --r-btn2: 4px; --r-card: 8px;
  --wrap: 1150px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px; line-height: 1.63;
  color: var(--c-body); background: var(--c-white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: #2264d6; text-decoration: none; }
a:hover { text-decoration: underline; }
ul { list-style: none; }

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

/* ---------- 标题体系（紧行高，load-bearing） ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-title);
  font-weight: 700;
  font-kerning: normal;
  color: var(--c-ink);
  letter-spacing: .01em;
}
h1 { font-size: 64px; line-height: 1.17; }
h2 { font-size: 44px; line-height: 1.19; }
h3 { font-size: 22px; line-height: 1.21; }

/* uppercase 章节标签（wayfinding） */
.kicker {
  font-family: var(--font-title);
  font-size: 13px; font-weight: 700;
  letter-spacing: 4px; line-height: 1.69;
  text-transform: uppercase;
  color: var(--c-red);
  display: block; margin-bottom: 14px;
}
.dark .kicker, .darker .kicker { color: var(--c-red-ondark); }

/* ---------- 明暗分区 ---------- */
.sec { padding: 80px 0; background: var(--c-white); }
.sec.light { background: var(--c-light); }
.sec.dark { background: var(--c-dark); }
.sec.darker { background: var(--c-darker); }
.sec.dark h1, .sec.dark h2, .sec.dark h3, .sec.dark h4,
.sec.darker h1, .sec.darker h2, .sec.darker h3, .sec.darker h4 { color: var(--c-white); }
.sec.dark, .sec.darker { color: var(--c-ondark-sub); }

.sec-head { max-width: 720px; margin-bottom: 48px; }
.sec-head p { margin-top: 16px; font-size: 18px; color: var(--c-helper); }
.sec.dark .sec-head p, .sec.darker .sec-head p { color: var(--c-ondark-sub); }

/* ---------- 导航 ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--c-darker);
  border-bottom: 1px solid rgba(178,182,189,.15);
}
.nav-inner {
  max-width: var(--wrap); margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; gap: 28px;
}
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none !important; }
.logo img { height: 36px; width: auto; }
.logo small {
  color: var(--c-ondark); font-size: 13px; font-weight: 600; letter-spacing: .04em;
  white-space: nowrap;
}
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav-links a {
  color: var(--c-ondark-sub); font-size: 15px; font-weight: 500;
  text-decoration: none; padding: 4px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links a.on { color: #fff; border-bottom-color: var(--c-red); }
.lang-btn {
  font-family: var(--font); font-size: 13px; font-weight: 600;
  color: var(--c-ondark); background: transparent;
  border: 1px solid var(--bd-dark); border-radius: var(--r-btn2);
  padding: 5px 12px; cursor: pointer;
}
.lang-btn:hover { border-color: var(--c-ondark-sub); }
.burger { display: none; background: none; border: 0; cursor: pointer; width: 40px; height: 40px; position: relative; }
.burger i, .burger i::before, .burger i::after {
  content: ""; display: block; width: 22px; height: 2px; background: #fff;
  position: absolute; left: 9px; top: 19px;
}
.burger i::before { top: -7px; left: 0; }
.burger i::after { top: 7px; left: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; font-family: var(--font);
  font-size: 16px; font-weight: 600; line-height: 1;
  padding: 13px 22px; border-radius: var(--r-btn);
  text-decoration: none !important; cursor: pointer;
  transition: background .15s, border-color .15s;
}
.btn-red { background: var(--c-red); color: #fff !important; border: 1px solid transparent; }
.btn-red:hover { background: var(--c-red-deep); }
.btn-dark {
  background: var(--c-dark); color: var(--c-ondark-sub) !important;
  border: 1px solid var(--bd-light); box-shadow: var(--sh);
}
.btn-dark:hover { background: #22262e; }
.btn-white {
  background: #fff; color: var(--c-body) !important;
  border: 1px solid var(--bd-light); border-radius: var(--r-btn2);
  padding: 12px 20px; box-shadow: var(--sh);
}
.btn-white:hover { background: var(--c-light); }
.btn-ghost {
  background: transparent; color: var(--c-ondark) !important;
  border: 1px solid var(--bd-dark);
}
.btn-ghost:hover { border-color: var(--c-ondark-sub); background: rgba(255,255,255,.04); }
:focus-visible { outline: 3px solid rgba(217,43,43,.5); outline-offset: 2px; }

/* ---------- Hero ---------- */
.hero { position: relative; background: var(--c-dark); overflow: hidden; }
.hero-cover {
  min-height: 100vh;
  display: flex; align-items: center;
  background-position: center; background-size: cover; background-repeat: no-repeat;
}
.hero-overlay {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(13,14,18,.84) 0%, rgba(13,14,18,.45) 55%, rgba(13,14,18,.18) 100%),
    linear-gradient(180deg, rgba(13,14,18,.65) 0%, transparent 30%, transparent 72%, rgba(13,14,18,1) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: var(--wrap); margin: 0 auto; padding: 150px 24px 130px;
  width: 100%;
}
.hero h1 { color: #fff; margin: 18px 0 20px; white-space: nowrap; font-size: clamp(22px, 6.5vw, 64px); }
.hero .sub { font-size: 20px; line-height: 1.5; color: var(--c-ondark-sub); max-width: 560px; }
.hero-cta { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }

/* 首页全屏大图时，导航半透明叠加在图片上 */
body.has-hero-cover .site-nav {
  background: rgba(13,14,18,.28);
  backdrop-filter: blur(6px);
  border-bottom-color: rgba(255,255,255,.08);
}
/* 内页小 hero */
.hero.small { min-height: auto; display: block; background: var(--c-dark); }
.hero.small .hero-in { max-width: var(--wrap); margin: 0 auto; padding: 72px 24px; position: relative; }
.hero.small h1 { font-size: 48px; margin: 16px 0 14px; }
.hero.small .sub { font-size: 18px; color: var(--c-ondark-sub); max-width: 640px; }
.hero.small .hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: .22;
}

/* ---------- 数字看板 ---------- */
.stats { background: var(--c-darker); border-top: 1px solid rgba(178,182,189,.12); }
.stats-in {
  max-width: var(--wrap); margin: 0 auto; padding: 34px 24px;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.stat b {
  display: block; font-family: var(--font-title); font-weight: 700;
  font-size: 30px; line-height: 1.2; color: #fff;
}
.stat b em { font-style: normal; color: var(--c-red-ondark); }
.stat span { font-size: 13px; color: var(--c-helper); letter-spacing: .06em; }

/* ---------- 卡片 ---------- */
.cards { display: grid; gap: 20px; }
.cards.c2 { grid-template-columns: repeat(2, 1fr); }
.cards.c3 { grid-template-columns: repeat(3, 1fr); }
.cards.c4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border-radius: var(--r-card);
  border: 1px solid var(--bd-light); box-shadow: var(--sh);
  padding: 26px;
}
.card h3 { margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--c-helper); line-height: 1.63; }
.sec.dark .card, .sec.darker .card {
  background: var(--c-darker); border-color: rgba(97,104,117,.5); box-shadow: none;
}
.sec.dark .card h3, .sec.darker .card h3 { color: #fff; }
.sec.dark .card p, .sec.darker .card p { color: var(--c-ondark-sub); }
.card .num {
  font-family: var(--font-title); font-weight: 700; font-size: 15px;
  color: var(--c-red); display: block; margin-bottom: 8px; letter-spacing: 1px;
}

/* 图片卡 */
.img-card {
  border-radius: var(--r-card); overflow: hidden;
  border: 1px solid var(--bd-light); box-shadow: var(--sh); background: #fff;
}
.img-card img { width: 100%; height: 210px; object-fit: cover; }
.img-card figcaption { padding: 14px 18px; font-size: 14px; color: var(--c-body); font-weight: 500; }
.sec.dark .img-card, .sec.darker .img-card { background: var(--c-darker); border-color: rgba(97,104,117,.5); }
.sec.dark .img-card figcaption, .sec.darker .img-card figcaption { color: var(--c-ondark-sub); }

/* 暗区产品图（透明 PNG 发光台） */
.prod-tile {
  background: linear-gradient(180deg, #191d24, var(--c-darker));
  border: 1px solid rgba(97,104,117,.45); border-radius: var(--r-card);
  padding: 22px; text-align: center;
}
.prod-tile img { width: 100%; height: 170px; object-fit: contain; margin-bottom: 14px; }
.prod-tile b { color: var(--c-ondark); font-size: 15px; font-weight: 600; }

/* ---------- 图文分栏 ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
}
.split h2 { margin-bottom: 18px; }
.split p { color: var(--c-helper); font-size: 16px; }
.sec.dark .split p, .sec.darker .split p { color: var(--c-ondark-sub); }
.split .img-side img { width: 100%; border-radius: var(--r-card); border: 1px solid var(--bd-light); }
.split .cta-line { margin-top: 26px; }
.split ul.ticks { margin-top: 18px; }
.split ul.ticks li {
  padding: 9px 0 9px 26px; position: relative; font-size: 16px;
}
.split ul.ticks li::before {
  content: ""; position: absolute; left: 0; top: 16px;
  width: 12px; height: 12px; border-radius: 2px; background: var(--c-red);
}

/* ---------- 表格（企业档案） ---------- */
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--bd-light); box-shadow: var(--sh); }
.spec-table th, .spec-table td { text-align: left; padding: 15px 20px; font-size: 15px; border-bottom: 1px solid var(--c-light); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: 0; }
.spec-table th { width: 180px; color: var(--c-ink); font-weight: 600; background: #fafbfb; }
.spec-table td { color: var(--c-body); }

/* ---------- 流程步 ---------- */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: step; }
.step {
  background: #fff; border: 1px solid var(--bd-light); border-radius: var(--r-card);
  box-shadow: var(--sh); padding: 20px 18px; position: relative;
}
.step i {
  font-style: normal; font-family: var(--font-title); font-weight: 700;
  font-size: 13px; letter-spacing: 1px; color: var(--c-red); display: block; margin-bottom: 8px;
}
.step b { font-size: 15px; color: var(--c-ink); font-weight: 600; line-height: 1.4; display: block; }
.sec.dark .step, .sec.darker .step { background: var(--c-darker); border-color: rgba(97,104,117,.5); box-shadow: none; }
.sec.dark .step b, .sec.darker .step b { color: var(--c-ondark); }

/* ---------- CTA 横幅 ---------- */
.cta-band { background: var(--c-dark); padding: 72px 0; }
.cta-in { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; text-align: center; }
.cta-band h2 { color: #fff; margin-bottom: 14px; }
.cta-band p { color: var(--c-ondark-sub); font-size: 18px; margin-bottom: 30px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-darker); color: var(--c-ondark-sub); border-top: 1px solid rgba(178,182,189,.12); }
.ft-in {
  max-width: var(--wrap); margin: 0 auto; padding: 56px 24px 40px;
  display: grid; grid-template-columns: 1.4fr 1fr 1.4fr; gap: 40px;
}
.ft-brand em { display: block; font-style: normal; color: var(--c-ondark); font-weight: 600; margin-bottom: 6px; }
.ft-brand p { font-size: 14px; color: var(--c-helper); }
.site-footer h5 {
  font-family: var(--font-title); font-size: 13px; font-weight: 700;
  letter-spacing: 3px; text-transform: uppercase; color: var(--c-red-ondark);
  margin-bottom: 14px;
}
.site-footer ul li { margin-bottom: 9px; font-size: 14px; color: var(--c-ondark-sub); }
.site-footer ul li a { color: var(--c-ondark-sub); text-decoration: none; }
.site-footer ul li a:hover { color: #fff; text-decoration: underline; }
.ft-copy {
  border-top: 1px solid rgba(178,182,189,.12);
  text-align: center; font-size: 13px; color: var(--c-helper); padding: 18px 24px;
}

/* ---------- 相册 ---------- */
.gal-pills { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 36px; }
.gal-pill {
  font-family: var(--font); font-size: 14px; font-weight: 600;
  padding: 8px 16px; border-radius: var(--r-btn); cursor: pointer;
  background: #fff; color: var(--c-body); border: 1px solid var(--bd-light); box-shadow: var(--sh);
}
.gal-pill.on { background: var(--c-red); border-color: var(--c-red); color: #fff; }
.gal-album h2 { font-size: 26px; margin: 34px 0 18px; }
.gal-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gal-item { display: block; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--bd-light); cursor: zoom-in; }
.gal-item img { width: 100%; height: 170px; object-fit: cover; transition: transform .25s; }
.gal-item:hover img { transform: scale(1.04); }
.gal-album.hide { display: none; }
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(13,14,18,.94);
  display: none; align-items: center; justify-content: center; flex-direction: column; padding: 40px;
}
.lightbox.open { display: flex; }
.lb-img { max-width: 90vw; max-height: 78vh; object-fit: contain; border-radius: var(--r-card); }
.lb-cap { color: var(--c-ondark-sub); margin-top: 14px; font-size: 14px; }
.lb-close, .lb-prev, .lb-next {
  position: absolute; background: rgba(255,255,255,.08); color: #fff;
  border: 1px solid var(--bd-dark); border-radius: var(--r-btn);
  width: 44px; height: 44px; font-size: 20px; cursor: pointer;
}
.lb-close { top: 22px; right: 22px; }
.lb-prev { left: 22px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 22px; top: 50%; transform: translateY(-50%); }

/* ---------- 滚动浮现 ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.rv.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  h1 { font-size: 44px; } h2 { font-size: 34px; }
  .hero-content { padding: 120px 24px 100px; }
  .stats-in { grid-template-columns: repeat(3, 1fr); }
  .cards.c3, .cards.c4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .ft-in { grid-template-columns: 1fr 1fr; }
  .gal-grid { grid-template-columns: repeat(3, 1fr); }
  .logo small { display: none; }
}
@media (max-width: 768px) {
  h1 { font-size: 36px; } h2 { font-size: 28px; }
  .hero.small h1 { font-size: 32px; }
  .sec { padding: 48px 0; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: var(--c-darker); flex-direction: column; align-items: flex-start;
    padding: 16px 24px 22px; gap: 14px; border-bottom: 1px solid rgba(178,182,189,.15);
  }
  .nav-links.open { display: flex; }
  .burger { display: block; margin-left: auto; }
  .nav-links { margin-left: 0; }
  .stats-in { grid-template-columns: repeat(2, 1fr); }
  .cards.c2, .cards.c3, .cards.c4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .ft-in { grid-template-columns: 1fr; }
  .gal-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-cta .btn { width: 100%; text-align: center; }
  .hero-content { padding-left: 16px; padding-right: 16px; }
}