/* ==========================================================================
   海缸圈 · haigangquan.cn
   骨架完全对齐 fkf 887 行 CSS 架构，配色改为深海主题：
     深海蓝 #0a1220 / 面板 #0f1a2d / 珊瑚青 #00d4d4 / 珊瑚粉 #ff6b6b / 米白文字
   ========================================================================== */

:root {
  --ink: #dce5f0;
  --muted: #7f8ca3;
  --graphite: #0a1220;
  --panel: #0f1a2d;
  --panel-2: #142238;
  --line: #1f2f4a;
  --teal: #00d4d4;
  --teal-strong: #4de8e8;
  --teal-dark: #063a3a;
  --coral: #ff6b6b;
  --gray: #a8b4c8;
  --amber: #ffcc70;
  --danger: #ff7a7a;
  --shadow: 0 22px 60px rgb(0 0 0 / 45%);
  --radius: 18px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 82% -10%, rgb(0 212 212 / 10%), transparent 32rem),
    radial-gradient(circle at 5% 20%, rgb(255 107 107 / 6%), transparent 28rem),
    linear-gradient(180deg, #060a13, var(--graphite) 38rem);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--teal); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--teal); outline-offset: 3px;
}
img { display: block; max-width: 100%; }

/* Skip link (a11y + SEO 信号) */
.skip-link {
  position: absolute; left: -9999px; top: 1rem; z-index: 100;
  padding: 0.65rem 1rem; border-radius: 8px;
  background: var(--teal); color: #001a1a; font-weight: 800;
}
.skip-link:focus { left: 1rem; }

/* ========== HEADER ========== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid rgb(0 212 212 / 15%);
  background: rgb(6 10 19 / 88%);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 14px clamp(16px, 4vw, 32px);
  display: flex; align-items: center; gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.05rem;
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--teal), var(--teal-strong));
  color: #001a1a; font-weight: 900; font-size: 0.95rem;
}
.nav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  color: var(--gray); font-size: 0.92rem; font-weight: 500;
  padding: 6px 0; position: relative;
}
.nav a:hover { color: var(--teal); }
.header-status {
  font-size: 0.72rem; color: var(--coral); font-weight: 700;
  padding: 4px 10px; border: 1px solid rgb(255 107 107 / 35%);
  border-radius: 999px; letter-spacing: 0.08em;
}

/* ========== HERO (首页) ========== */
.hero {
  max-width: var(--max); margin: 40px auto 20px;
  padding: 0 clamp(16px, 4vw, 32px);
  display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(20px, 4vw, 60px);
  align-items: center;
}
@media(max-width: 820px) { .hero { grid-template-columns: 1fr; } }
.eyebrow {
  color: var(--teal); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 54px); line-height: 1.15;
  margin: 12px 0 18px;
  background: linear-gradient(135deg, #f0f6ff, var(--teal));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: 1.08rem; color: var(--gray); margin-bottom: 24px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.button {
  padding: 11px 22px; border-radius: 10px;
  background: linear-gradient(135deg, var(--teal), var(--teal-strong));
  color: #001a1a; font-weight: 700; font-size: 0.95rem;
  border: none; cursor: pointer; transition: transform .15s;
}
.button:hover { transform: translateY(-2px); color: #001a1a; }
.button.secondary {
  background: transparent; color: var(--teal);
  border: 1px solid rgb(0 212 212 / 40%);
}
.hero-visual { margin: 0; }
.hero-visual img {
  width: 100%; height: auto; aspect-ratio: 16/9;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: block;
}
.visual-caption {
  margin-top: 10px; text-align: center;
  color: var(--muted); font-size: 0.75rem; letter-spacing: 0.1em;
}

/* ========== INTENT CORE (6 卡) ========== */
.intent-core { max-width: var(--max); margin: 40px auto; padding: 0 clamp(16px, 4vw, 32px); }
.intent-core__head { max-width: 780px; margin-bottom: 24px; }
.intent-core__eyebrow {
  color: var(--teal); font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase; margin: 0 0 8px;
}
.intent-core__head h2 { font-size: 1.7rem; margin: 0 0 10px; color: #f0f6ff; }
.intent-core__head p { color: var(--gray); margin: 0; }
.intent-core__grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px;
}
@media(max-width: 820px) { .intent-core__grid { grid-template-columns: 1fr 1fr; } }
@media(max-width: 560px) { .intent-core__grid { grid-template-columns: 1fr; } }
.intent-core__card {
  padding: 18px 20px; border: 1px solid var(--line); border-radius: 14px;
  background: rgb(20 34 56 / 40%); transition: border-color .15s, transform .15s;
}
.intent-core__card:hover { border-color: rgb(0 212 212 / 40%); transform: translateY(-2px); }
.intent-core__card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--teal); }
.intent-core__card p { margin: 0; color: var(--gray); font-size: 0.92rem; }

/* ========== TRUST STRIP (4 项) ========== */
.trust-strip {
  max-width: var(--max); margin: 24px auto; padding: 20px clamp(16px, 4vw, 32px);
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px;
  background: rgb(15 26 45 / 60%); border: 1px solid var(--line);
  border-radius: var(--radius);
}
@media(max-width: 820px) { .trust-strip { grid-template-columns: 1fr 1fr; } }
@media(max-width: 480px) { .trust-strip { grid-template-columns: 1fr; } }
.trust-item { display: flex; flex-direction: column; gap: 4px; }
.trust-item strong { color: var(--teal); font-size: 0.88rem; letter-spacing: 0.02em; }
.trust-item span { color: var(--gray); font-size: 0.86rem; }

/* ========== SECTION 通用 ========== */
.section { max-width: var(--max); margin: 60px auto; padding: 0 clamp(16px, 4vw, 32px); }
.container { max-width: 100%; }
.section-head { margin-bottom: 24px; }
.section-head > div { display: flex; align-items: baseline; gap: 14px; margin-bottom: 8px; }
.section-head h2 { font-size: 1.7rem; margin: 0; color: #f0f6ff; }
.section-head p { color: var(--gray); margin: 0; }
.kicker {
  color: var(--teal); font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase;
}

/* ========== GRID + CARD (通用) ========== */
.grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px;
}
@media(max-width: 820px) { .grid { grid-template-columns: 1fr 1fr; } }
@media(max-width: 560px) { .grid { grid-template-columns: 1fr; } }
.card {
  padding: 20px 22px; border: 1px solid var(--line); border-radius: 14px;
  background: rgb(15 26 45 / 60%); transition: border-color .15s, transform .15s;
  display: flex; flex-direction: column; gap: 8px;
}
.card:hover { border-color: rgb(0 212 212 / 40%); transform: translateY(-2px); }
.card-index {
  font-size: 0.72rem; color: var(--muted);
  letter-spacing: 0.12em; text-transform: uppercase; font-weight: 700;
}
.card h3 { margin: 0; font-size: 1.08rem; color: #f0f6ff; line-height: 1.35; }
.card > p { margin: 0; color: var(--gray); font-size: 0.9rem; line-height: 1.65; }
.card-footer {
  margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between;
  font-size: 0.8rem; color: var(--muted);
}
.card-footer span:last-child { color: var(--teal); }

/* ========== EXPLAINER (DEEP DIVE 4 步骤) ========== */
.explainer {
  display: grid; grid-template-columns: 1.05fr 1.15fr; gap: 40px;
}
@media(max-width: 820px) { .explainer { grid-template-columns: 1fr; } }
.notice {
  margin-top: 16px; padding: 14px 18px;
  background: rgb(0 212 212 / 8%); border-left: 4px solid var(--teal);
  border-radius: 8px; color: var(--ink);
}
.steps { display: flex; flex-direction: column; gap: 16px; }
.step { display: flex; gap: 14px; align-items: flex-start; }
.step-number {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; border-radius: 10px;
  background: rgb(0 212 212 / 15%); color: var(--teal);
  font-weight: 800; font-size: 0.95rem;
}
.step h3 { margin: 0 0 4px; font-size: 1.02rem; color: #f0f6ff; }
.step p { margin: 0; color: var(--gray); font-size: 0.92rem; }

/* ========== TERMINAL 代码块 ========== */
.terminal {
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  background: #050912; font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
.terminal-bar {
  padding: 8px 14px; background: rgb(20 34 56 / 90%); border-bottom: 1px solid var(--line);
  font-size: 0.78rem; color: var(--muted); letter-spacing: 0.05em;
}
.terminal pre {
  margin: 0; padding: 16px 18px; overflow-x: auto;
  color: var(--ink); font-size: 0.88rem; line-height: 1.9;
}
.token-key { color: var(--teal); }
.token-value { color: var(--amber); }

/* ========== FAQ ========== */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-list details {
  border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 18px; background: rgb(15 26 45 / 60%);
}
.faq-list summary {
  cursor: pointer; font-weight: 600; color: #f0f6ff;
  font-size: 0.98rem;
}
.faq-list summary::marker { color: var(--teal); }
.faq-list details[open] { border-color: rgb(0 212 212 / 30%); }
.faq-list p { margin: 12px 0 0; color: var(--gray); font-size: 0.92rem; }

/* ========== QUOTES ========== */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media(max-width: 820px) { .quotes { grid-template-columns: 1fr; } }
.quote {
  margin: 0; padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px;
  background: rgb(15 26 45 / 60%);
}
.quote p { margin: 0 0 12px; color: var(--ink); font-size: 0.95rem; font-style: italic; }
.quote figcaption { color: var(--muted); font-size: 0.82rem; }

/* ========== DAILY-GUIDE-CARD / DAILY-RELATED-GUIDE ========== */
.daily-guide-card,
.daily-related-guide {
  max-width: var(--max); margin: 30px auto; padding: 20px clamp(16px, 4vw, 32px);
  border: 1px solid var(--line); border-radius: var(--radius);
  background: rgb(15 26 45 / 60%);
}
.daily-guide-card { border-left: 4px solid var(--teal); }
.daily-related-guide { border-left: 4px solid var(--coral); }
.daily-guide-card h2, .daily-related-guide h2 { margin: 0 0 8px; font-size: 1.15rem; color: #f0f6ff; }
.daily-guide-card p, .daily-related-guide p { margin: 0 0 8px; color: var(--gray); font-size: 0.92rem; }
.daily-guide-card a, .daily-related-guide a { color: var(--teal); font-weight: 600; }

/* ========== PAGE-HERO (非首页) ========== */
.page-hero {
  padding: 40px clamp(16px, 4vw, 32px) 30px;
  border-bottom: 1px solid var(--line);
}
.page-hero .container { max-width: var(--max); margin: 0 auto; }
.breadcrumb {
  font-size: 0.85rem; color: var(--muted); margin-bottom: 14px;
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
}
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--teal); }
.breadcrumb span { color: var(--muted); }
.page-hero h1 {
  font-size: clamp(28px, 4vw, 42px); margin: 12px 0 14px; color: #f0f6ff;
  line-height: 1.25;
}
.page-hero > .container > p { color: var(--gray); font-size: 1rem; max-width: 780px; }
.listing-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.chip {
  padding: 5px 12px; border-radius: 999px; font-size: 0.78rem;
  background: rgb(0 212 212 / 12%); color: var(--teal);
  border: 1px solid rgb(0 212 212 / 25%);
}
a.chip:hover { background: rgb(0 212 212 / 20%); color: var(--teal-strong); }

/* ========== ARTICLE-SHELL (双栏) ========== */
.article-shell {
  max-width: var(--max); margin: 40px auto; padding: 0 clamp(16px, 4vw, 32px);
  display: grid; grid-template-columns: 1fr 300px; gap: 40px;
}
@media(max-width: 900px) { .article-shell { grid-template-columns: 1fr; } }
.article-body h2 { margin: 1.8em 0 0.6em; font-size: 1.35rem; color: #f0f6ff; }
.article-body h3 { margin: 1.4em 0 0.5em; font-size: 1.08rem; color: var(--teal); }
.article-body p { margin: 0 0 1em; color: var(--ink); }
.article-body ul, .article-body ol { margin: 0 0 1em; padding-left: 1.5em; color: var(--ink); }
.article-body li { margin-bottom: 6px; }
.article-body strong { color: #f0f6ff; }
.article-body code {
  background: rgb(20 34 56 / 80%); padding: 2px 6px; border-radius: 4px;
  font-size: 0.88em; color: var(--teal-strong);
}
.article-body .answer {
  border-left: 5px solid var(--teal);
  background: rgb(0 212 212 / 8%);
  padding: 16px 20px; border-radius: 10px;
  margin: 0 0 1.8em; color: #f0f6ff;
  font-size: 1.02rem;
}
.article-body .answer strong { color: var(--teal); }
.article-body table {
  width: 100%; border-collapse: collapse; margin: 1.2em 0;
  font-size: 0.88rem; background: rgb(15 26 45 / 60%); border-radius: 8px; overflow: hidden;
  display: block; overflow-x: auto;
}
.article-body th {
  background: rgb(0 212 212 / 12%); color: var(--teal);
  padding: 10px 12px; text-align: left; border-bottom: 2px solid var(--line);
  font-weight: 600; font-size: 0.85rem;
}
.article-body td {
  padding: 10px 12px; border-bottom: 1px solid var(--line);
  vertical-align: top; color: var(--ink);
}
.article-body tbody tr:hover { background: rgb(0 212 212 / 5%); }
.article-body figure {
  margin: 1.8em 0; padding: 0;
}
.article-body figure img {
  width: 100%; height: auto; border-radius: 12px;
  border: 1px solid var(--line);
}
.article-body figcaption {
  margin-top: 8px; color: var(--muted); font-size: 0.86rem;
  text-align: center; font-style: italic;
}
.article-aside { display: flex; flex-direction: column; gap: 16px; }
.aside-box {
  padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px;
  background: rgb(15 26 45 / 60%);
}
.aside-box h2 { margin: 0 0 10px; font-size: 0.98rem; color: var(--teal); }
.aside-box ul { margin: 0; padding-left: 1.2em; color: var(--gray); font-size: 0.88rem; }
.aside-box li { margin-bottom: 4px; }
.aside-box p { margin: 0; color: var(--gray); font-size: 0.9rem; }

/* ========== FOOTER ========== */
.site-footer {
  margin-top: 80px; padding: 40px clamp(16px, 4vw, 32px) 30px;
  border-top: 1px solid var(--line); background: rgb(6 10 19 / 60%);
}
.footer-grid {
  max-width: var(--max); margin: 0 auto;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 30px;
}
@media(max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media(max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-grid h2 { margin: 0 0 10px; font-size: 0.95rem; color: var(--teal); }
.footer-grid p { color: var(--gray); font-size: 0.86rem; line-height: 1.7; }
.footer-links { display: flex; flex-direction: column; gap: 6px; }
.footer-links a { color: var(--gray); font-size: 0.86rem; }
.footer-links a:hover { color: var(--teal); }
.footer-bottom {
  max-width: var(--max); margin: 24px auto 0; padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: var(--muted); font-size: 0.8rem;
}
.site-live-update {
  display: block; max-width: var(--max); margin: 12px auto 0;
  text-align: right; color: var(--muted); font-size: 0.78rem;
}