/* ============================================
   颐元优控 · TOKEN 优控系统 · 官网样式
   风格：深空蓝 + 科技青 · 专业 · 数据驱动
   ============================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --c-bg:        #0B132B;
    --c-bg-2:      #111B3A;
    --c-card:      #152042;
    --c-card-2:    #1A2855;
    --c-accent:    #3EE4C7;
    --c-accent-2:  #5B8DEF;
    --c-text:      #E6EDF6;
    --c-text-2:    #9CA8BD;
    --c-line:      rgba(155,170,200,.12);
    --c-warn:      #F5A623;
    --c-ok:        #3EE4C7;
    --shadow:      0 8px 30px rgba(0,0,0,.35);
    --r:           12px;
    --maxw:        1200px;
}
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Navbar ---------- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(11,19,43,.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-line);
    transition: all .3s;
}
.nav-container {
    max-width: var(--maxw); margin: 0 auto;
    padding: 0 24px; height: 64px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; }
.logo-icon { color: var(--c-accent); font-size: 22px; }
.nav-menu { display: flex; gap: 8px; }
.nav-link {
    padding: 8px 14px; border-radius: 8px; font-size: 14px;
    color: var(--c-text-2); transition: all .2s;
}
.nav-link:hover, .nav-link.active { color: var(--c-text); background: rgba(62,228,199,.08); }
.nav-toggle { display: none; background: none; border: none; color: var(--c-text); font-size: 24px; cursor: pointer; }

/* ---------- Hero ---------- */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center;
    padding: 100px 0 60px; overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 600px 400px at 70% 40%, rgba(62,228,199,.08), transparent),
        radial-gradient(ellipse 400px 600px at 20% 70%, rgba(91,141,239,.06), transparent);
    z-index: 0;
}
.hero-container {
    max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
    display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px;
    align-items: center; position: relative; z-index: 1;
}
.hero-badge {
    display: inline-block; padding: 6px 16px;
    background: rgba(62,228,199,.1); border: 1px solid rgba(62,228,199,.3);
    border-radius: 20px; font-size: 13px; color: var(--c-accent);
    margin-bottom: 20px;
}
.hero-title { font-size: 52px; font-weight: 800; line-height: 1.15; margin-bottom: 20px; }
.text-gradient {
    background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle { font-size: 18px; color: var(--c-text-2); margin-bottom: 36px; line-height: 1.8; }
.hero-stats { display: flex; gap: 24px; margin-bottom: 36px; }
.stat-card {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); padding: 20px 24px; text-align: center;
    min-width: 130px;
}
.stat-number { font-size: 32px; font-weight: 800; color: var(--c-accent); }
.stat-label { font-size: 12px; color: var(--c-text-2); margin-top: 4px; }
.hero-actions { display: flex; gap: 16px; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; border-radius: 10px; font-size: 15px;
    font-weight: 600; cursor: pointer; transition: all .25s; border: none;
}
.btn-primary { background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2)); color: #0B132B; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(62,228,199,.3); }
.btn-outline { background: transparent; border: 1px solid var(--c-line); color: var(--c-text); }
.btn-outline:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* Hero Visual */
.hero-visual { position: relative; height: 400px; }
.hero-orb {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    width: 200px; height: 200px; border-radius: 50%;
    background: radial-gradient(circle, rgba(62,228,199,.3), transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}
.hero-ring {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
    border: 1px solid rgba(62,228,199,.2); border-radius: 50%;
}
.ring-1 { width: 260px; height: 260px; animation: spin 20s linear infinite; }
.ring-2 { width: 340px; height: 340px; animation: spin 30s linear infinite reverse; border-color: rgba(91,141,239,.15); }
.ring-3 { width: 420px; height: 420px; animation: spin 40s linear infinite; border-color: rgba(155,170,200,.08); }
.hero-particle {
    position: absolute; width: 6px; height: 6px; border-radius: 50%;
    background: var(--c-accent); opacity: .6;
}
.p1 { top: 20%; left: 30%; animation: float 4s ease-in-out infinite; }
.p2 { top: 60%; left: 70%; animation: float 5s ease-in-out infinite 1s; }
.p3 { top: 80%; left: 20%; animation: float 3.5s ease-in-out infinite .5s; }
.p4 { top: 30%; left: 80%; animation: float 4.5s ease-in-out infinite 1.5s; }
.p5 { top: 70%; left: 40%; animation: float 3s ease-in-out infinite 2s; }

@keyframes pulse { 0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.3} 50%{transform:translate(-50%,-50%) scale(1.1);opacity:.5} }
@keyframes spin { to { transform: translate(-50%,-50%) rotate(360deg); } }
@keyframes float { 0%,100%{transform:translateY(0);opacity:.6} 50%{transform:translateY(-15px);opacity:1} }

.scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); text-align: center; font-size: 13px; color: var(--c-text-2); }
.scroll-arrow { font-size: 20px; margin-top: 4px; animation: bounce 2s infinite; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(8px)} }

/* ---------- Section Header ---------- */
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag { font-size: 12px; letter-spacing: 3px; color: var(--c-accent); font-weight: 600; margin-bottom: 8px; }
.section-title { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.section-desc { font-size: 16px; color: var(--c-text-2); }

/* ---------- Values ---------- */
.values { padding: 100px 0; background: var(--c-bg-2); }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.value-card {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); padding: 36px 28px;
    transition: all .3s;
}
.value-card:hover { transform: translateY(-4px); border-color: rgba(62,228,199,.3); box-shadow: var(--shadow); }
.value-icon { font-size: 36px; margin-bottom: 16px; }
.value-card h3 { font-size: 20px; margin-bottom: 12px; }
.value-card p { color: var(--c-text-2); font-size: 14px; margin-bottom: 16px; }
.value-list { padding-left: 0; }
.value-list li { padding: 6px 0; font-size: 14px; color: var(--c-text-2); border-bottom: 1px solid var(--c-line); }
.value-list li:last-child { border: none; }
.value-list li::before { content: "✓ "; color: var(--c-accent); font-weight: 700; }

/* ---------- User Value / Tabs ---------- */
.user-value { padding: 100px 0; }
.value-tabs { display: flex; gap: 12px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.tab-btn {
    display: flex; align-items: center; gap: 8px;
    padding: 12px 28px; border-radius: 10px; font-size: 15px; font-weight: 600;
    background: var(--c-card); border: 1px solid var(--c-line); color: var(--c-text-2);
    cursor: pointer; transition: all .25s;
}
.tab-btn:hover { border-color: rgba(62,228,199,.3); color: var(--c-text); }
.tab-btn.active { background: linear-gradient(135deg, rgba(62,228,199,.15), rgba(91,141,239,.1)); border-color: var(--c-accent); color: var(--c-accent); }
.tab-icon { font-size: 18px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn .4s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.panel-text h3 { font-size: 24px; margin-bottom: 16px; }
.panel-text p { color: var(--c-text-2); margin-bottom: 24px; }
.panel-metrics { display: flex; gap: 20px; margin-bottom: 24px; }
.metric { text-align: center; }
.metric-value { font-size: 28px; font-weight: 800; color: var(--c-accent); }
.metric-label { font-size: 12px; color: var(--c-text-2); }
.panel-features li { padding: 8px 0; font-size: 14px; border-bottom: 1px solid var(--c-line); }
.panel-features li::before { content: "▸ "; color: var(--c-accent); }

/* Code Block */
.code-block {
    background: #0D1530; border: 1px solid var(--c-line);
    border-radius: var(--r); overflow: hidden;
}
.code-header { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: #111B3A; border-bottom: 1px solid var(--c-line); }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #FF5F56; }
.dot.yellow { background: #FFBD2E; }
.dot.green { background: #27C93F; }
.code-title { margin-left: auto; font-size: 12px; color: var(--c-text-2); }
.code-block pre { padding: 20px; overflow-x: auto; }
.code-block code { font-family: 'Fira Code', 'Consolas', monospace; font-size: 13px; color: #A5B4CB; line-height: 1.8; }

/* ---------- Cases ---------- */
.cases { padding: 100px 0; background: var(--c-bg-2); }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.case-card {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); padding: 32px 28px;
    transition: all .3s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(62,228,199,.2); }
.case-header { display: flex; gap: 10px; margin-bottom: 16px; }
.case-industry, .case-tier {
    display: inline-block; padding: 4px 12px; border-radius: 6px;
    font-size: 12px; font-weight: 600;
}
.case-industry { background: rgba(91,141,239,.15); color: var(--c-accent-2); }
.case-tier { background: rgba(62,228,199,.15); color: var(--c-accent); }
.case-card h3 { font-size: 18px; margin-bottom: 12px; }
.case-card p { font-size: 14px; color: var(--c-text-2); margin-bottom: 20px; }
.case-card strong { color: var(--c-accent); }
.case-metrics { display: flex; gap: 20px; padding-top: 16px; border-top: 1px solid var(--c-line); }
.case-metrics div { text-align: center; }
.case-metrics .big { display: block; font-size: 22px; font-weight: 800; color: var(--c-accent); }
.case-metrics small { font-size: 11px; color: var(--c-text-2); }

/* ---------- Security ---------- */
.security { padding: 100px 0; }
.security-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-bottom: 60px; }
.security-card {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); padding: 32px 28px;
}
.sec-icon { font-size: 32px; margin-bottom: 16px; }
.security-card h3 { font-size: 18px; margin-bottom: 12px; }
.security-card p { font-size: 14px; color: var(--c-text-2); margin-bottom: 16px; }
.security-card ul li { padding: 6px 0; font-size: 13px; color: var(--c-text-2); border-bottom: 1px solid var(--c-line); }
.security-card ul li::before { content: "🛡 "; }

.security-articles h3 { font-size: 20px; margin-bottom: 20px; }
.article-list { display: flex; flex-direction: column; gap: 0; }
.article-item {
    display: flex; align-items: center; gap: 16px;
    padding: 16px 0; border-bottom: 1px solid var(--c-line);
    transition: all .2s;
}
.article-item:hover { padding-left: 8px; }
.article-date { font-size: 13px; color: var(--c-text-2); min-width: 100px; }
.article-title { flex: 1; font-size: 15px; }
.article-tag {
    display: inline-block; padding: 3px 10px; border-radius: 4px;
    font-size: 11px; background: rgba(91,141,239,.15); color: var(--c-accent-2);
}

/* ---------- News ---------- */
.news { padding: 100px 0; background: var(--c-bg-2); }
.news-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.news-col-title { font-size: 20px; margin-bottom: 24px; padding-bottom: 12px; border-bottom: 2px solid var(--c-accent); }
.news-list { display: flex; flex-direction: column; }
.news-item {
    padding: 18px 0; border-bottom: 1px solid var(--c-line);
    transition: all .2s; cursor: pointer;
}
.news-item:hover { padding-left: 8px; }
.news-item-date { font-size: 12px; color: var(--c-text-2); margin-bottom: 6px; }
.news-item-title { font-size: 15px; font-weight: 500; }
.news-item-excerpt { font-size: 13px; color: var(--c-text-2); margin-top: 6px; }

/* ---------- Policies (OPC / AGENT) ---------- */
.policies { padding: 100px 0; }
.policy-block {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); padding: 36px; margin-bottom: 32px;
}
.policy-header { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.policy-badge {
    display: inline-block; padding: 6px 16px; border-radius: 8px;
    font-size: 14px; font-weight: 700; letter-spacing: 1px;
}
.policy-badge.opc { background: linear-gradient(135deg, var(--c-accent), #2BC4A8); color: #0B132B; }
.policy-badge.agent { background: linear-gradient(135deg, var(--c-accent-2), #4A7DD9); color: #fff; }
.policy-header h3 { font-size: 22px; }
.policy-body > p { color: var(--c-text-2); margin-bottom: 24px; }
.policy-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.policy-item {
    background: var(--c-bg-2); border: 1px solid var(--c-line);
    border-radius: 10px; padding: 24px;
}
.policy-item h4 { font-size: 16px; margin-bottom: 12px; color: var(--c-accent); }
.policy-item ul li { padding: 5px 0; font-size: 13px; color: var(--c-text-2); }
.policy-item ul li::before { content: "→ "; color: var(--c-accent-2); }

/* SDK */
.sdk-section { margin-top: 40px; }
.sdk-section h3 { font-size: 20px; margin-bottom: 24px; }
.sdk-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sdk-card {
    background: var(--c-bg-2); border: 1px solid var(--c-line);
    border-radius: 10px; padding: 24px; text-align: center;
}
.sdk-lang { font-size: 18px; font-weight: 700; color: var(--c-accent); margin-bottom: 12px; }
.sdk-card code { display: block; background: #0D1530; padding: 10px; border-radius: 6px; font-size: 13px; margin-bottom: 12px; color: var(--c-accent); }
.sdk-card p { font-size: 13px; color: var(--c-text-2); }

/* ---------- About ---------- */
.about { padding: 100px 0; background: var(--c-bg-2); }
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; }
.about-text h3 { font-size: 24px; margin-bottom: 16px; }
.about-text p { color: var(--c-text-2); margin-bottom: 16px; }
.about-metrics { display: flex; gap: 32px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--c-line); }
.about-metrics div { text-align: center; }
.about-metrics .big { font-size: 28px; font-weight: 800; color: var(--c-accent); }
.about-metrics small { font-size: 12px; color: var(--c-text-2); }

.about-contact h3 { font-size: 20px; margin-bottom: 24px; }
.contact-list { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-icon { font-size: 22px; }
.contact-item strong { display: block; font-size: 14px; margin-bottom: 2px; }
.contact-item p { font-size: 13px; color: var(--c-text-2); }

/* ---------- FAQ ---------- */
.faq { padding: 100px 0; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--c-card); border: 1px solid var(--c-line);
    border-radius: var(--r); margin-bottom: 12px; overflow: hidden;
}
.faq-item summary {
    padding: 20px 24px; font-size: 16px; font-weight: 600;
    cursor: pointer; list-style: none;
    display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--c-accent); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 24px 20px; font-size: 14px; color: var(--c-text-2); }

/* ---------- Footer ---------- */
.footer { padding: 60px 0 24px; background: #080F24; border-top: 1px solid var(--c-line); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: var(--c-text-2); }
.footer-links h4 { font-size: 15px; margin-bottom: 14px; color: var(--c-accent); }
.footer-links a { display: block; padding: 5px 0; font-size: 13px; color: var(--c-text-2); transition: color .2s; }
.footer-links a:hover { color: var(--c-accent); }
.footer-bottom { padding-top: 24px; border-top: 1px solid var(--c-line); text-align: center; font-size: 12px; color: var(--c-text-2); }

/* ---------- Admin Entry (hidden) ---------- */
.admin-entry {
    position: fixed; bottom: 20px; right: 20px; z-index: 999;
    opacity: .3; transition: opacity .3s;
}
.admin-entry:hover { opacity: 1; }
.admin-entry a {
    display: flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--c-card); border: 1px solid var(--c-line);
    font-size: 20px;
}
.admin-entry a:hover { border-color: var(--c-accent); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .hero-container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .hero-title { font-size: 36px; }
    .values-grid, .cases-grid, .security-grid { grid-template-columns: 1fr; }
    .panel-grid, .news-layout, .policy-grid, .about-grid, .footer-grid { grid-template-columns: 1fr; }
    .sdk-grid { grid-template-columns: 1fr; }
    .nav-menu { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: var(--c-bg); padding: 20px; border-bottom: 1px solid var(--c-line); }
    .nav-menu.open { display: flex; }
    .nav-toggle { display: block; }
    .hero-stats { flex-wrap: wrap; }
}