/* ──────────────────────────────────────────────────────────
   云启跨海 CloudBridge AI · 品牌主题 + 服务站样式
   桥 / 云 / 海浪意象 · 深蓝 navy + 亮蓝 blue + 橙色 accent
   覆盖原润滑油站的 amber/steel 配色，并提供 cb- 区块样式
   ────────────────────────────────────────────────────────── */
:root {
  --cb-navy: #13386b;
  --cb-navy-deep: #0e2a52;
  --cb-blue: #2f9bd6;
  --cb-blue-soft: #eaf4fb;
  --cb-accent: #f5a623;
  --cb-accent-dark: #d4870f;
  --cb-ink: #16202e;
  --cb-muted: #5a6b80;
  --cb-line: #e2e9f1;
  --cb-paper: #f5f8fc;
  --cb-white: #ffffff;
  --cb-shadow: 0 20px 48px rgba(19, 56, 107, 0.12);

  /* 复用原布局变量名 → 全站换成品牌色（页眉/页脚/CTA 自动跟随）*/
  --ink: var(--cb-ink);
  --muted: var(--cb-muted);
  --line: var(--cb-line);
  --paper: var(--cb-paper);
  --amber: var(--cb-accent);
  --amber-dark: var(--cb-accent-dark);
  --steel: var(--cb-navy);
  --steel-dark: var(--cb-navy-deep);
  --ink-deep: var(--cb-navy-deep);
  --teal: var(--cb-blue);
  --teal-dark: #1f7bb0;
  --shadow: var(--cb-shadow);
}

body { background: var(--cb-paper); color: var(--cb-ink); }

/* ── 页眉 logo / CTA ───────────────────────────── */
.brand__logo { display: block; height: 48px; width: auto; }
.site-header { gap: 20px; }
.nav-links { gap: 26px; }
.nav-links a { font-weight: 500; color: var(--cb-ink); }
.nav-links a:hover { color: var(--cb-blue); }
.header-cta {
  background: var(--cb-accent); color: #2a1c02; font-weight: 700;
  padding: 11px 20px; border-radius: 999px; white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease;
}
.header-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(245,166,35,.35); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ── 通用区块骨架 ───────────────────────────── */
.cb-section { padding: clamp(56px, 8vw, 104px) clamp(20px, 6vw, 96px); max-width: 1200px; margin: 0 auto; }
.cb-section__head { max-width: 760px; margin-bottom: clamp(32px, 5vw, 52px); }
.cb-section__title { font-size: clamp(1.6rem, 3.4vw, 2.5rem); line-height: 1.15; letter-spacing: -.02em; color: var(--cb-navy); margin: 10px 0 0; font-weight: 800; }
.cb-section__intro { margin-top: 16px; font-size: 1.08rem; line-height: 1.7; color: var(--cb-muted); }
.cb-eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--cb-blue); margin: 0; }
.cb-eyebrow--light { color: #8fc4ea; }

/* ── 按钮 ───────────────────────────── */
.cb-btn { display: inline-flex; align-items: center; justify-content: center; padding: 13px 26px; border-radius: 999px; font-weight: 700; transition: transform .15s ease, box-shadow .15s ease; }
.cb-btn--accent { background: var(--cb-accent); color: #2a1c02; }
.cb-btn--accent:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(245,166,35,.4); }
.cb-btn--ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.5); }
.cb-btn--ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.cb-btn--lg { padding: 16px 34px; font-size: 1.05rem; }

/* ── Hero ───────────────────────────── */
.cb-hero { position: relative; overflow: hidden; color: #fff; background: linear-gradient(160deg, var(--cb-navy-deep) 0%, var(--cb-navy) 55%, #1a4f8f 100%); }
.cb-hero__bg { position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 90% at 85% 0%, rgba(47,155,214,.35), transparent 60%),
    radial-gradient(40% 70% at 10% 100%, rgba(245,166,35,.18), transparent 60%);
}
/* 桥拱意象：底部一道弧线 */
.cb-hero__bg::after { content: ""; position: absolute; left: -10%; right: -10%; bottom: -55%; height: 80%;
  border-radius: 50%; border-top: 2px solid rgba(143,196,234,.4); }
.cb-hero__inner { position: relative; max-width: 1000px; margin: 0 auto; padding: clamp(72px, 12vw, 140px) clamp(20px, 6vw, 96px); }
.cb-hero__title { font-size: clamp(2rem, 5.2vw, 3.5rem); line-height: 1.1; letter-spacing: -.025em; font-weight: 800; margin: 18px 0 0; max-width: 16ch; }
.cb-hero__sub { margin: 22px 0 0; font-size: clamp(1.05rem, 2vw, 1.28rem); line-height: 1.65; color: #cfe3f4; max-width: 56ch; }
.cb-hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

/* ── 价值支柱 ───────────────────────────── */
.cb-pillars__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
.cb-pillar { position: relative; background: var(--cb-white); border: 1px solid var(--cb-line); border-radius: 18px; padding: 32px 28px; transition: transform .18s ease, box-shadow .18s ease; }
.cb-pillar:hover { transform: translateY(-4px); box-shadow: var(--cb-shadow); }
.cb-pillar__num { font-size: .85rem; font-weight: 800; color: var(--cb-blue); letter-spacing: .1em; }
.cb-pillar h3 { font-size: 1.22rem; color: var(--cb-navy); margin: 12px 0 10px; font-weight: 700; }
.cb-pillar p { margin: 0; color: var(--cb-muted); line-height: 1.7; }

/* ── 服务卡 ───────────────────────────── */
.cb-services { background: var(--cb-white); border-radius: 0; max-width: none; }
.cb-services > .cb-section__head, .cb-services > .cb-services__grid { max-width: 1200px; margin-left: auto; margin-right: auto; }
.cb-services__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.cb-card { background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 18px; padding: 30px 28px; display: flex; flex-direction: column; transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.cb-card:hover { transform: translateY(-5px); box-shadow: var(--cb-shadow); border-color: #cfe0f0; }
.cb-card__icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 14px; background: var(--cb-blue-soft); color: var(--cb-blue); margin-bottom: 18px; }
.cb-card__icon svg { width: 26px; height: 26px; }
.cb-card__title { font-size: 1.25rem; color: var(--cb-navy); margin: 0 0 8px; font-weight: 700; }
.cb-card__summary { margin: 0 0 14px; color: var(--cb-accent-dark); font-weight: 600; line-height: 1.5; }
.cb-card__desc { margin: 0 0 16px; color: var(--cb-muted); line-height: 1.7; font-size: .96rem; }
.cb-card__features { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 8px; }
.cb-card__features li { position: relative; padding-left: 22px; color: var(--cb-ink); font-size: .92rem; line-height: 1.5; }
.cb-card__features li::before { content: ""; position: absolute; left: 4px; top: .55em; width: 7px; height: 7px; border-radius: 2px; background: var(--cb-blue); }
.cb-card__outcome { margin: auto 0 0; padding-top: 16px; border-top: 1px dashed var(--cb-line); color: var(--cb-navy); font-weight: 600; font-size: .95rem; }

/* ── 流程 ───────────────────────────── */
.cb-process { }
.cb-process__track { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 22px; counter-reset: step; }
.cb-step { position: relative; padding-top: 8px; }
.cb-step__dot { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--cb-navy); color: #fff; font-weight: 800; margin-bottom: 16px; }
.cb-step h3 { font-size: 1.1rem; color: var(--cb-navy); margin: 0 0 8px; font-weight: 700; }
.cb-step p { margin: 0; color: var(--cb-muted); line-height: 1.65; font-size: .95rem; }
@media (min-width: 760px) {
  .cb-step:not(:last-child)::after { content: ""; position: absolute; top: 22px; left: calc(44px + 10px); right: -22px; height: 2px; background: linear-gradient(90deg, var(--cb-blue), transparent); }
}

/* ── 信任带 ───────────────────────────── */
.cb-trust { background: var(--cb-navy); color: #fff; max-width: none; }
.cb-trust__inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
.cb-trust .cb-section__title { color: #fff; }
.cb-trust__points { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 12px; }
.cb-trust__points li { position: relative; padding-left: 28px; color: #cfe3f4; line-height: 1.5; }
.cb-trust__points li::before { content: "✓"; position: absolute; left: 0; color: var(--cb-accent); font-weight: 800; }
.cb-trust__body { margin: 0; color: #d6e4f3; line-height: 1.85; font-size: 1.05rem; }
@media (max-width: 760px) { .cb-trust__inner { grid-template-columns: 1fr; } }

/* ── 联系 / CTA ───────────────────────────── */
.cb-contact { }
.cb-contact__card { max-width: 760px; margin: 0 auto; text-align: center; background: var(--cb-white); border: 1px solid var(--cb-line); border-radius: 24px; padding: clamp(40px, 6vw, 64px) clamp(24px, 5vw, 56px); box-shadow: var(--cb-shadow); }
.cb-contact__title { font-size: clamp(1.5rem, 3.2vw, 2.2rem); color: var(--cb-navy); margin: 0 0 14px; font-weight: 800; letter-spacing: -.02em; }
.cb-contact__body { color: var(--cb-muted); line-height: 1.7; margin: 0 0 28px; font-size: 1.05rem; }
.cb-contact__channels { list-style: none; padding: 0; margin: 32px 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 32px; border-top: 1px solid var(--cb-line); padding-top: 26px; }
.cb-contact__channels li { display: flex; flex-direction: column; gap: 4px; }
.cb-contact__label { font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; color: var(--cb-muted); }
.cb-contact__channels a { color: var(--cb-navy); font-weight: 600; }
.cb-contact__channels a:hover { color: var(--cb-blue); }

/* ── 关于页 ───────────────────────────── */
.cb-about-hero { background: linear-gradient(160deg, var(--cb-navy-deep), var(--cb-navy)); color: #fff; }
.cb-about-hero__inner { max-width: 1000px; margin: 0 auto; padding: clamp(60px, 9vw, 110px) clamp(20px, 6vw, 96px); }
.cb-about-hero h1 { font-size: clamp(1.7rem, 3.6vw, 2.6rem); line-height: 1.2; letter-spacing: -.02em; margin: 16px 0 0; max-width: 24ch; font-weight: 800; }
.cb-about-story { display: grid; grid-template-columns: 1.6fr 1fr; gap: clamp(28px, 5vw, 60px); align-items: start; }
.cb-about-story__body p { color: var(--cb-ink); line-height: 1.9; font-size: 1.06rem; margin: 0 0 18px; }
.cb-about-mission { background: var(--cb-blue-soft); border-radius: 20px; padding: 30px 28px; }
.cb-about-mission__text { font-size: 1.15rem; color: var(--cb-navy); font-weight: 700; line-height: 1.5; margin: 10px 0 22px; }
.cb-about-facts { margin: 0; display: grid; gap: 14px; }
.cb-about-facts div { display: grid; gap: 2px; }
.cb-about-facts dt { font-size: .76rem; letter-spacing: .08em; text-transform: uppercase; color: var(--cb-muted); }
.cb-about-facts dd { margin: 0; color: var(--cb-ink); font-weight: 600; }
@media (max-width: 820px) { .cb-about-story { grid-template-columns: 1fr; } }

/* ── 语言切换 ───────────────────────────── */
.lang-toggle { font-weight: 600; font-size: .88rem; color: var(--cb-navy); border: 1px solid var(--cb-line); border-radius: 999px; padding: 7px 13px; transition: border-color .15s ease, color .15s ease; }
.lang-toggle:hover { border-color: var(--cb-blue); color: var(--cb-blue); }

/* ── 我们服务谁 ───────────────────────────── */
.cb-audience { background: var(--cb-white); max-width: none; }
.cb-audience > .cb-section__head, .cb-audience > .cb-audience__grid { max-width: 1200px; margin-left: auto; margin-right: auto; }
.cb-audience__grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px 28px; }
.cb-audience__item { display: flex; gap: 12px; align-items: flex-start; padding: 16px 18px; background: var(--cb-paper); border: 1px solid var(--cb-line); border-radius: 12px; line-height: 1.5; color: var(--cb-ink); }
.cb-audience__tick { color: var(--cb-accent); font-weight: 800; flex: none; }

/* ── 我们的优势 ───────────────────────────── */
.cb-adv__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.cb-adv { position: relative; background: var(--cb-white); border: 1px solid var(--cb-line); border-radius: 18px; padding: 30px 28px; transition: transform .18s ease, box-shadow .18s ease; }
.cb-adv:hover { transform: translateY(-4px); box-shadow: var(--cb-shadow); }
.cb-adv__num { font-size: .85rem; font-weight: 800; color: var(--cb-blue); letter-spacing: .1em; }
.cb-adv h3 { font-size: 1.18rem; color: var(--cb-navy); margin: 12px 0 10px; font-weight: 700; }
.cb-adv p { margin: 0; color: var(--cb-muted); line-height: 1.7; }

/* ── 切入方式 / 路径（深色带）───────────────── */
.cb-approach { background: var(--cb-navy); color: #fff; max-width: none; }
.cb-approach__inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.05fr; gap: clamp(28px, 5vw, 64px); align-items: start; }
.cb-approach .cb-section__title { color: #fff; }
.cb-approach__text { margin: 20px 0 0; color: #d6e4f3; line-height: 1.85; font-size: 1.05rem; }
.cb-approach__steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.cb-approach__step { display: flex; gap: 16px; align-items: flex-start; }
.cb-approach__num { display: grid; place-items: center; flex: none; width: 38px; height: 38px; border-radius: 50%; background: var(--cb-accent); color: #2a1c02; font-weight: 800; }
.cb-approach__step h3 { margin: 4px 0 4px; font-size: 1.08rem; color: #fff; font-weight: 700; }
.cb-approach__step p { margin: 0; color: #b9cde3; line-height: 1.55; font-size: .96rem; }
@media (max-width: 820px) { .cb-approach__inner { grid-template-columns: 1fr; } }

/* ── Hero 下方成果条 ───────────────────────────── */
.cb-proof { background: var(--cb-navy-deep); color: #fff; }
.cb-proof__inner { max-width: 1160px; margin: 0 auto; padding: 26px clamp(20px, 6vw, 96px); display: flex; flex-wrap: wrap; align-items: center; gap: 16px 40px; }
.cb-proof__head { flex: 1 1 260px; }
.cb-proof__lead { margin: 0; font-weight: 700; color: #fff; font-size: 1.08rem; line-height: 1.4; }
.cb-proof__lead::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--cb-accent); margin-right: 10px; vertical-align: middle; }
.cb-proof__source { margin: 6px 0 0 18px; font-size: .82rem; color: #8fb2d4; }
.cb-proof__stats { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 36px; margin: 0; padding: 0; }
.cb-proof__stats li { display: flex; flex-direction: column; }
.cb-proof__num { font-size: 1.7rem; font-weight: 800; color: var(--cb-accent); line-height: 1.1; }
.cb-proof__label { font-size: .82rem; color: #b9cde3; }

/* ── 客户案例 ───────────────────────────── */
.cb-cases { }
.cb-cases__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 26px; }
.cb-case { display: flex; flex-direction: column; background: var(--cb-white); border: 1px solid var(--cb-line); border-radius: 18px; overflow: hidden; transition: transform .18s ease, box-shadow .18s ease; }
.cb-case:hover { transform: translateY(-4px); box-shadow: var(--cb-shadow); }
.cb-case__media { display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--cb-blue-soft); }
.cb-case__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.cb-case:hover .cb-case__media img { transform: scale(1.04); }
.cb-case__body { padding: 24px 26px 26px; display: flex; flex-direction: column; }
.cb-case__industry { margin: 0 0 6px; font-size: .78rem; letter-spacing: .06em; text-transform: uppercase; color: var(--cb-blue); font-weight: 700; }
.cb-case__title { margin: 0 0 6px; font-size: 1.24rem; color: var(--cb-navy); font-weight: 700; }
.cb-case__subtitle { margin: 0 0 16px; color: var(--cb-muted); line-height: 1.55; }
.cb-case__stats { display: flex; gap: 22px; padding: 16px 0; margin-bottom: 14px; border-top: 1px solid var(--cb-line); border-bottom: 1px solid var(--cb-line); }
.cb-case__stats div { display: flex; flex-direction: column; }
.cb-case__stats strong { font-size: 1.5rem; color: var(--cb-accent-dark); font-weight: 800; line-height: 1.1; }
.cb-case__stats span { font-size: .76rem; color: var(--cb-muted); }
.cb-case__result { margin: 0 0 16px; color: var(--cb-ink); line-height: 1.65; font-weight: 500; }
.cb-case__highlights { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 8px; }
.cb-case__highlights li { position: relative; padding-left: 20px; color: var(--cb-muted); font-size: .92rem; line-height: 1.5; }
.cb-case__highlights li::before { content: ""; position: absolute; left: 3px; top: .55em; width: 6px; height: 6px; border-radius: 2px; background: var(--cb-blue); }
.cb-case__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.cb-case__tags span { font-size: .78rem; color: var(--cb-navy); background: var(--cb-blue-soft); border-radius: 999px; padding: 4px 11px; }
.cb-case__link { margin-top: auto; align-self: flex-start; font-weight: 700; color: var(--cb-blue); }
.cb-case__link:hover { color: var(--cb-navy); }

/* ── 页脚品牌色微调 ───────────────────────────── */
.site-footer__motto { color: var(--cb-blue); }