/*! Ledger中文站 - 深蓝科技主题 v1.0 */

/* ========== 设计系统 ========== */
:root {
  /* 深蓝科技配色 */
  --navy-950: #020617;
  --navy-900: #0f172a;
  --navy-800: #1e293b;
  --navy-700: #334155;
  --navy-600: #475569;
  --navy-500: #64748b;
  --navy-400: #94a3b8;
  --navy-300: #cbd5e1;
  --navy-200: #e2e8f0;
  --navy-100: #f1f5f9;
  --navy-50: #f8fafc;
  
  /* 霓虹蓝 */
  --neon: #3b82f6;
  --neon-light: #60a5fa;
  --neon-dark: #2563eb;
  --neon-glow: rgba(59, 130, 246, 0.5);
  
  /* 金色accent */
  --gold: #f59e0b;
  --gold-light: #fbbf24;
  
  /* 功能色 */
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  /* 尺寸 */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  
  /* 圆角 */
  --round-sm: 6px;
  --round-md: 10px;
  --round-lg: 16px;
  --round-xl: 24px;
  --round-2xl: 32px;
  --round-full: 9999px;
  
  /* 字体 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  
  /* 布局 */
  --max-w: 1280px;
  --topbar-h: 72px;
  
  /* 层级 */
  --z-topbar: 1000;
  --z-float: 900;
  --z-modal: 1100;
}

/* ========== 重置 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--topbar-h); }
body { font-family: var(--font); font-size: 16px; line-height: 1.6; background: var(--navy-950); color: var(--navy-100); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
body.menu-active { overflow: hidden; }
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; width: 100%; }

/* ========== 工具 ========== */
.ld-skip { position: absolute; top: -100%; left: 50%; transform: translateX(-50%); background: var(--neon); color: white; padding: 12px 24px; border-radius: var(--round-md); z-index: 9999; }
.ld-skip:focus { top: 16px; }
.ld-container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-6); }
@media (min-width: 768px) { .ld-container { padding: 0 var(--space-10); } }

/* ========== 按钮系统 ========== */
.ld-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); padding: 14px 28px; font-size: 15px; font-weight: 600; border-radius: var(--round-full); transition: all 0.25s ease; white-space: nowrap; border: 2px solid transparent; }
.ld-btn--primary { background: var(--neon); color: white; border-color: var(--neon); }
.ld-btn--primary:hover { background: var(--neon-dark); border-color: var(--neon-dark); transform: translateY(-2px); box-shadow: 0 8px 24px var(--neon-glow); }
.ld-btn--outline { background: transparent; color: var(--navy-100); border-color: var(--navy-600); }
.ld-btn--outline:hover { border-color: var(--neon); color: var(--neon); }
.ld-btn--outline-light { background: transparent; color: white; border-color: rgba(255,255,255,0.3); }
.ld-btn--outline-light:hover { background: white; color: var(--navy-900); border-color: white; }
.ld-btn--white { background: white; color: var(--navy-900); border-color: white; }
.ld-btn--white:hover { background: var(--navy-100); }
.ld-btn--glow { background: var(--neon); color: white; border-color: var(--neon); box-shadow: 0 0 20px var(--neon-glow); }
.ld-btn--glow:hover { box-shadow: 0 0 32px var(--neon-glow), 0 8px 24px var(--neon-glow); }
.ld-btn--xl { padding: 18px 36px; font-size: 16px; }
.ld-btn:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }

/* ========== TOPBAR ========== */
.ld-topbar { position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h); background: rgba(15, 23, 42, 0.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); z-index: var(--z-topbar); border-bottom: 1px solid rgba(255,255,255,0.05); transition: all 0.3s ease; }
.ld-topbar.is-scrolled { background: rgba(15, 23, 42, 0.95); box-shadow: 0 4px 24px rgba(0,0,0,0.3); }
.ld-topbar__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-6); }

/* ========== BRAND 四角短线框 ========== */
.ld-brand { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--navy-100); }
.ld-brand__icon { fill: var(--neon); }
.ld-brand__frame { position: relative; display: inline-flex; align-items: center; padding: 8px 16px; }
.ld-brand__frame::before, .ld-brand__frame::after, .ld-brand__corner-bl, .ld-brand__corner-br { position: absolute; width: 12px; height: 12px; }
.ld-brand__frame::before { content: ""; top: 0; left: 0; border-top: 2px solid var(--navy-400); border-left: 2px solid var(--navy-400); }
.ld-brand__frame::after { content: ""; top: 0; right: 0; border-top: 2px solid var(--navy-400); border-right: 2px solid var(--navy-400); }
.ld-brand__corner-bl { bottom: 0; left: 0; border-bottom: 2px solid var(--navy-400); border-left: 2px solid var(--navy-400); }
.ld-brand__corner-br { bottom: 0; right: 0; border-bottom: 2px solid var(--navy-400); border-right: 2px solid var(--navy-400); }
.ld-brand__name { font-size: 16px; font-weight: 600; letter-spacing: 0.02em; color: var(--navy-100); }
.ld-brand--light .ld-brand__frame::before, .ld-brand--light .ld-brand__frame::after, .ld-brand--light .ld-brand__corner-bl, .ld-brand--light .ld-brand__corner-br { border-color: rgba(255,255,255,0.5); }
.ld-brand--light .ld-brand__name { color: white; }

/* ========== MENU ========== */
.ld-menu { display: none; gap: var(--space-1); }
@media (min-width: 1024px) { .ld-menu { display: flex; } }
.ld-menu__item { padding: 10px 18px; font-size: 14px; font-weight: 500; color: var(--navy-400); border-radius: var(--round-full); transition: all 0.2s ease; }
.ld-menu__item:hover, .ld-menu__item.is-active { color: var(--navy-100); background: var(--navy-800); }

.ld-topbar__actions { display: flex; align-items: center; gap: var(--space-4); }
.ld-topbar__actions .ld-btn { display: none; }
@media (min-width: 1024px) { .ld-topbar__actions .ld-btn { display: inline-flex; } }

/* ========== BURGER ========== */
.ld-burger { display: flex; flex-direction: column; justify-content: center; gap: 6px; width: 44px; height: 44px; padding: 10px; }
@media (min-width: 1024px) { .ld-burger { display: none; } }
.ld-burger span { display: block; height: 2px; background: var(--navy-100); border-radius: 2px; transition: all 0.3s ease; }
body.menu-active .ld-burger span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
body.menu-active .ld-burger span:nth-child(2) { opacity: 0; }
body.menu-active .ld-burger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

body.menu-active .ld-menu { display: flex; flex-direction: column; position: fixed; top: var(--topbar-h); left: 0; right: 0; bottom: 0; background: var(--navy-900); padding: var(--space-8); gap: var(--space-2); animation: menuFade 0.3s ease; }
body.menu-active .ld-menu__item { padding: 18px; font-size: 20px; text-align: center; background: var(--navy-800); border-radius: var(--round-lg); }
@keyframes menuFade { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }

/* ========== HERO 左右分屏 ========== */
.ld-hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: calc(var(--topbar-h) + var(--space-16)) 0 var(--space-16); overflow: hidden; }
.ld-hero__bg { position: absolute; inset: 0; z-index: 0; }
.ld-hero__video { position: absolute; top: 50%; left: 50%; min-width: 100%; min-height: 100%; transform: translate(-50%, -50%); object-fit: cover; opacity: 0.7; }
.ld-hero__mask { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.6) 0%, rgba(15,23,42,0.4) 50%, rgba(15,23,42,0.5) 100%); }
.ld-hero__grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px); background-size: 64px 64px; }

.ld-hero__wrap { position: relative; z-index: 1; display: grid; gap: var(--space-16); max-width: var(--max-w); margin: 0 auto; padding: 0 var(--space-6); }
@media (min-width: 1024px) { .ld-hero__wrap { grid-template-columns: 1.2fr 1fr; align-items: center; padding: 0 var(--space-10); } }
.ld-hero__wrap--center { display: flex; flex-direction: column; align-items: center; text-align: center; }
@media (min-width: 1024px) { .ld-hero__wrap--center { display: flex; } }
.ld-hero__content { max-width: 800px; }

.ld-hero__left { max-width: 640px; }
.ld-chip { display: inline-block; padding: 8px 18px; font-size: 12px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--neon-light); background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.3); border-radius: var(--round-full); margin-bottom: var(--space-6); animation: fadeUp 0.6s ease; }
.ld-hero__heading { font-size: clamp(36px, 7vw, 64px); font-weight: 800; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: var(--space-6); animation: fadeUp 0.6s ease 0.1s both; }
.ld-glow-text { color: var(--neon-light); text-shadow: 0 0 40px var(--neon-glow); }
.ld-hero__intro { font-size: 18px; color: var(--navy-400); margin-bottom: var(--space-8); line-height: 1.7; animation: fadeUp 0.6s ease 0.2s both; }
.ld-hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-12); animation: fadeUp 0.6s ease 0.3s both; }
.ld-hero__stats { display: flex; gap: var(--space-10); animation: fadeUp 0.6s ease 0.4s both; }
.ld-stat { text-align: center; }
.ld-stat__num { font-size: 36px; font-weight: 800; color: white; }
.ld-stat__unit { font-size: 20px; font-weight: 700; color: var(--neon-light); }
.ld-stat__label { display: block; font-size: 13px; color: var(--navy-500); margin-top: var(--space-1); }

.ld-hero__right { display: none; justify-content: center; }
@media (min-width: 1024px) { .ld-hero__right { display: flex; } }
.ld-hero__device { position: relative; }
.ld-hero__img { position: relative; z-index: 2; filter: drop-shadow(0 32px 64px rgba(0,0,0,0.4)); animation: float 6s ease-in-out infinite; }
.ld-hero__ring { position: absolute; top: 50%; left: 50%; width: 400px; height: 400px; border: 1px solid rgba(59,130,246,0.2); border-radius: 50%; transform: translate(-50%, -50%); animation: pulse-ring 4s ease-out infinite; }
.ld-hero__ring--delay { animation-delay: 2s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
@keyframes pulse-ring { 0% { transform: translate(-50%, -50%) scale(0.8); opacity: 1; } 100% { transform: translate(-50%, -50%) scale(1.4); opacity: 0; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

.ld-hero__scroll { position: absolute; bottom: var(--space-10); left: 50%; transform: translateX(-50%); }
.ld-hero__scroll-dot { display: block; width: 8px; height: 8px; background: var(--neon); border-radius: 50%; animation: scroll-dot 2s ease-in-out infinite; }
@keyframes scroll-dot { 0%, 100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(16px); opacity: 0.3; } }

/* ========== TRUST BAR ========== */
.ld-trust { background: var(--navy-900); border-top: 1px solid rgba(255,255,255,0.05); border-bottom: 1px solid rgba(255,255,255,0.05); padding: var(--space-5) 0; overflow: hidden; }
.ld-trust__track { display: flex; gap: var(--space-12); animation: scroll-track 30s linear infinite; }
.ld-trust__item { display: flex; align-items: center; gap: var(--space-3); white-space: nowrap; color: var(--navy-400); font-size: 14px; font-weight: 500; }
.ld-trust__item svg { stroke: var(--neon); fill: none; stroke-width: 1.5; }
@keyframes scroll-track { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ========== SECTION HEADING ========== */
.ld-heading { margin-bottom: var(--space-12); }
.ld-heading--center { text-align: center; max-width: 640px; margin-left: auto; margin-right: auto; }
.ld-heading--light { color: white; }
.ld-heading--light .ld-heading__sub { color: rgba(255,255,255,0.6); }
.ld-heading__tag { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; color: var(--neon); margin-bottom: var(--space-4); }
.ld-heading__title { font-size: clamp(28px, 5vw, 42px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: var(--space-4); color: white; }
.ld-heading__sub { font-size: 17px; color: var(--navy-400); }

/* ========== SHOWCASE Tab产品 ========== */
.ld-showcase { padding: var(--space-24) 0; background: var(--navy-950); }
.ld-tabs__nav { display: flex; justify-content: center; gap: var(--space-2); margin-bottom: var(--space-12); flex-wrap: wrap; }
.ld-tabs__btn { padding: 12px 24px; font-size: 14px; font-weight: 600; color: var(--navy-400); background: var(--navy-800); border-radius: var(--round-full); transition: all 0.25s ease; }
.ld-tabs__btn:hover { color: var(--navy-100); }
.ld-tabs__btn.is-active { color: white; background: var(--neon); box-shadow: 0 4px 16px var(--neon-glow); }

.ld-tabs__panel { display: none; }
.ld-tabs__panel.is-active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.ld-product { display: grid; gap: var(--space-12); background: linear-gradient(135deg, var(--navy-800) 0%, var(--navy-900) 100%); border: 1px solid rgba(255,255,255,0.05); border-radius: var(--round-2xl); padding: var(--space-10); }
@media (min-width: 768px) { .ld-product { grid-template-columns: 1fr 1.2fr; align-items: center; } }
.ld-product__visual { position: relative; text-align: center; }
.ld-product__visual img { max-height: 400px; margin: 0 auto; filter: drop-shadow(0 24px 48px rgba(0,0,0,0.3)); }
.ld-product__badge { position: absolute; top: var(--space-4); right: var(--space-4); padding: 8px 16px; font-size: 12px; font-weight: 600; background: var(--navy-700); color: white; border-radius: var(--round-full); }
.ld-product__badge--hot { background: var(--gold); color: var(--navy-900); }
.ld-product__name { font-size: 32px; font-weight: 800; color: white; margin-bottom: var(--space-3); }
.ld-product__tagline { font-size: 17px; color: var(--navy-400); margin-bottom: var(--space-6); }
.ld-product__features { display: grid; gap: var(--space-3); margin-bottom: var(--space-8); }
.ld-product__features li { display: flex; align-items: center; gap: var(--space-3); font-size: 15px; color: var(--navy-300); }
.ld-product__features svg { stroke: var(--success); fill: none; stroke-width: 2; flex-shrink: 0; }

/* ========== COMPARE ========== */
.ld-compare { margin-top: var(--space-16); background: var(--navy-900); border-radius: var(--round-xl); padding: var(--space-8); border: 1px solid rgba(255,255,255,0.05); }
.ld-compare__title { font-size: 20px; font-weight: 700; text-align: center; margin-bottom: var(--space-6); color: white; }
.ld-compare__scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.ld-compare__table { min-width: 600px; }
.ld-compare__table th, .ld-compare__table td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--navy-800); }
.ld-compare__table th { font-size: 14px; font-weight: 600; color: var(--navy-300); background: var(--navy-800); }
.ld-compare__table th:first-child { border-radius: var(--round-md) 0 0 0; }
.ld-compare__table th:last-child { border-radius: 0 var(--round-md) 0 0; }
.ld-compare__table td { font-size: 14px; color: var(--navy-400); }
.ld-compare__table tbody tr:hover { background: var(--navy-800); }

/* ========== FLOW 时间线 ========== */
.ld-flow { padding: var(--space-24) 0; background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-950) 100%); }
.ld-timeline { position: relative; display: grid; gap: var(--space-8); margin-bottom: var(--space-16); }
@media (min-width: 768px) { .ld-timeline { grid-template-columns: repeat(4, 1fr); gap: var(--space-6); } }
.ld-timeline__line { display: none; }
@media (min-width: 768px) { .ld-timeline__line { display: block; position: absolute; top: 28px; left: 10%; right: 10%; height: 2px; background: linear-gradient(90deg, transparent, var(--neon), transparent); } }
.ld-timeline__item { position: relative; }
.ld-timeline__dot { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; color: white; background: var(--neon); border-radius: 50%; margin-bottom: var(--space-5); box-shadow: 0 0 24px var(--neon-glow); position: relative; z-index: 2; }
.ld-timeline__card { background: var(--navy-800); border: 1px solid rgba(255,255,255,0.05); border-radius: var(--round-lg); padding: var(--space-6); transition: all 0.3s ease; }
.ld-timeline__card:hover { transform: translateY(-4px); border-color: var(--neon); box-shadow: 0 12px 32px rgba(0,0,0,0.3); }
.ld-timeline__icon { margin-bottom: var(--space-4); }
.ld-timeline__icon svg { stroke: var(--neon); fill: none; stroke-width: 1.5; }
.ld-timeline__card h3 { font-size: 18px; font-weight: 700; color: white; margin-bottom: var(--space-2); }
.ld-timeline__card p { font-size: 14px; color: var(--navy-400); line-height: 1.6; }

.ld-tips-bar { display: grid; gap: var(--space-4); }
@media (min-width: 640px) { .ld-tips-bar { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .ld-tips-bar { grid-template-columns: repeat(4, 1fr); } }
.ld-tips-bar__item { display: flex; align-items: flex-start; gap: var(--space-4); background: var(--navy-800); border-radius: var(--round-lg); padding: var(--space-5); border: 1px solid rgba(255,255,255,0.05); }
.ld-tips-bar__item svg { stroke: var(--gold); fill: none; stroke-width: 1.5; flex-shrink: 0; margin-top: 2px; }
.ld-tips-bar__item strong { display: block; font-size: 14px; color: white; margin-bottom: var(--space-1); }
.ld-tips-bar__item span { font-size: 13px; color: var(--navy-500); }

/* ========== FORTRESS Bento Grid ========== */
.ld-fortress { padding: var(--space-24) 0; background: var(--navy-900); }
.ld-bento { display: grid; gap: var(--space-5); margin-bottom: var(--space-8); }
@media (min-width: 768px) { .ld-bento { grid-template-columns: repeat(3, 1fr); } }
.ld-bento__item { background: var(--navy-800); border: 1px solid rgba(255,255,255,0.05); border-radius: var(--round-xl); padding: var(--space-6); transition: all 0.3s ease; }
.ld-bento__item:hover { border-color: rgba(59,130,246,0.3); transform: translateY(-4px); }
.ld-bento__item--wide { grid-column: span 2; }
@media (max-width: 767px) { .ld-bento__item--wide { grid-column: span 1; } }
.ld-bento__item--tall { grid-row: span 2; }
.ld-bento__icon { margin-bottom: var(--space-4); }
.ld-bento__icon svg { stroke: var(--neon); fill: none; stroke-width: 1.5; }
.ld-bento__item h3 { font-size: 20px; font-weight: 700; color: white; margin-bottom: var(--space-3); }
.ld-bento__item h4 { font-size: 16px; font-weight: 600; color: white; margin-bottom: var(--space-2); }
.ld-bento__item p { font-size: 14px; color: var(--navy-400); line-height: 1.7; }

.ld-checklist { display: flex; flex-direction: column; gap: var(--space-4); }
.ld-checklist li { display: flex; align-items: center; gap: var(--space-3); font-size: 14px; color: var(--navy-300); }
.ld-checklist__mark { width: 20px; height: 20px; background: var(--success); border-radius: 50%; position: relative; flex-shrink: 0; }
.ld-checklist__mark::before { content: ""; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -60%) rotate(-45deg); width: 10px; height: 5px; border-left: 2px solid white; border-bottom: 2px solid white; }

.ld-alert { display: flex; gap: var(--space-4); background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3); border-radius: var(--round-lg); padding: var(--space-6); }
.ld-alert svg { stroke: var(--warning); fill: none; stroke-width: 1.5; flex-shrink: 0; }
.ld-alert strong { display: block; color: var(--warning); margin-bottom: var(--space-2); }
.ld-alert p { font-size: 14px; color: var(--navy-300); line-height: 1.6; }

/* ========== ANSWERS FAQ ========== */
.ld-answers { padding: var(--space-24) 0; background: var(--navy-950); }
.ld-faq { display: grid; gap: var(--space-8); margin-bottom: var(--space-8); }
@media (min-width: 768px) { .ld-faq { grid-template-columns: 200px 1fr; gap: var(--space-12); } }
.ld-faq__nav { display: flex; flex-direction: column; gap: var(--space-2); }
.ld-faq__cat { padding: 14px 20px; font-size: 14px; font-weight: 600; color: var(--navy-400); background: var(--navy-800); border-radius: var(--round-md); text-align: left; transition: all 0.2s ease; }
.ld-faq__cat:hover { color: white; }
.ld-faq__cat.is-active { color: white; background: var(--neon); }
.ld-faq__group { display: none; }
.ld-faq__group.is-active { display: block; }
.ld-faq__item { background: var(--navy-800); border-radius: var(--round-md); margin-bottom: var(--space-3); overflow: hidden; }
.ld-faq__item summary { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; font-size: 15px; font-weight: 600; color: white; cursor: pointer; list-style: none; }
.ld-faq__item summary::-webkit-details-marker { display: none; }
.ld-faq__item summary::after { content: "+"; font-size: 20px; color: var(--navy-500); transition: transform 0.3s ease; }
.ld-faq__item[open] summary::after { transform: rotate(45deg); color: var(--neon); }
.ld-faq__item p { padding: 0 24px 20px; font-size: 14px; color: var(--navy-400); line-height: 1.7; }
.ld-faq__cta { text-align: center; }
.ld-faq__cta p { color: var(--navy-400); margin-bottom: var(--space-4); }

/* ========== UPDATES 新闻 ========== */
.ld-updates { padding: var(--space-24) 0; background: var(--navy-900); }
.ld-news-grid { display: grid; gap: var(--space-6); }
@media (min-width: 768px) { .ld-news-grid { grid-template-columns: repeat(2, 1fr); } }
.ld-news { background: var(--navy-800); border-radius: var(--round-xl); overflow: hidden; transition: all 0.3s ease; border: 1px solid rgba(255,255,255,0.05); }
.ld-news:hover { transform: translateY(-6px); border-color: rgba(59,130,246,0.3); box-shadow: 0 16px 48px rgba(0,0,0,0.3); }
.ld-news--featured { grid-column: 1 / -1; }
@media (min-width: 768px) { .ld-news--featured { display: grid; grid-template-columns: 1.3fr 1fr; } }
.ld-news__img { aspect-ratio: 16/10; overflow: hidden; }
.ld-news--featured .ld-news__img { aspect-ratio: auto; height: 100%; min-height: 280px; }
.ld-news__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.ld-news:hover .ld-news__img img { transform: scale(1.06); }
.ld-news__body { padding: var(--space-6); }
.ld-news--featured .ld-news__body { display: flex; flex-direction: column; justify-content: center; padding: var(--space-8); }
.ld-news__tag { display: inline-block; padding: 5px 12px; font-size: 11px; font-weight: 600; background: var(--navy-700); color: var(--navy-300); border-radius: var(--round-full); margin-bottom: var(--space-4); }
.ld-news h3 { font-size: 18px; font-weight: 700; color: white; margin-bottom: var(--space-3); }
.ld-news--featured h3 { font-size: 24px; }
.ld-news p { font-size: 14px; color: var(--navy-400); margin-bottom: var(--space-4); line-height: 1.6; }
.ld-news__link { font-size: 14px; font-weight: 600; color: var(--neon-light); display: inline-flex; align-items: center; gap: var(--space-2); }
.ld-news__link:hover { color: var(--neon); }
.ld-news__link span { transition: transform 0.2s ease; }
.ld-news__link:hover span { transform: translateX(4px); }

/* ========== ABOUT ========== */
.ld-about { padding: var(--space-24) 0; background: var(--navy-950); }
.ld-about__grid { display: grid; gap: var(--space-12); align-items: center; }
@media (min-width: 1024px) { .ld-about__grid { grid-template-columns: 1fr 1fr; } }
.ld-about__content p { font-size: 17px; color: var(--navy-400); margin: var(--space-6) 0; line-height: 1.8; }
.ld-about__list { display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-6); }
.ld-about__list li { display: flex; align-items: center; gap: var(--space-3); font-size: 15px; color: var(--navy-300); }
.ld-about__list svg { stroke: var(--success); fill: none; stroke-width: 2; flex-shrink: 0; }
.ld-about__figure img { border-radius: var(--round-2xl); box-shadow: 0 32px 64px rgba(0,0,0,0.4); }

/* ========== CONTACT ========== */
.ld-contact { padding: var(--space-24) 0; background: var(--navy-900); }
.ld-contact__grid { display: grid; gap: var(--space-6); margin-bottom: var(--space-8); }
@media (min-width: 768px) { .ld-contact__grid { grid-template-columns: repeat(3, 1fr); } }
.ld-contact__card { background: var(--navy-800); border: 1px solid rgba(255,255,255,0.05); border-radius: var(--round-xl); padding: var(--space-8); text-align: center; transition: all 0.3s ease; }
.ld-contact__card:hover { border-color: rgba(59,130,246,0.3); transform: translateY(-4px); }
.ld-contact__card svg { stroke: var(--neon); fill: none; stroke-width: 1.5; margin-bottom: var(--space-5); }
.ld-contact__card h3 { font-size: 18px; font-weight: 700; color: white; margin-bottom: var(--space-2); }
.ld-contact__card p { font-size: 14px; color: var(--navy-400); margin-bottom: var(--space-5); }
.ld-contact__hours { text-align: center; font-size: 14px; color: var(--navy-500); }

/* ========== CTA ========== */
.ld-cta { padding: var(--space-24) 0; background: var(--navy-950); }
.ld-cta__box { background: linear-gradient(135deg, var(--neon-dark) 0%, var(--neon) 100%); border-radius: var(--round-2xl); padding: var(--space-16) var(--space-8); text-align: center; box-shadow: 0 24px 64px var(--neon-glow); }
.ld-cta__box h2 { font-size: clamp(24px, 5vw, 36px); font-weight: 800; color: white; margin-bottom: var(--space-4); }
.ld-cta__box p { font-size: 17px; color: rgba(255,255,255,0.8); margin-bottom: var(--space-8); }
.ld-cta__btns { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-4); }

/* ========== FOOTER ========== */
.ld-footer { background: var(--navy-900); padding: var(--space-16) 0 0; border-top: 1px solid rgba(255,255,255,0.05); }
.ld-footer__top { display: grid; gap: var(--space-12); padding-bottom: var(--space-12); border-bottom: 1px solid rgba(255,255,255,0.05); }
@media (min-width: 768px) { .ld-footer__top { grid-template-columns: 1fr 2fr; } }
.ld-footer__brand p { font-size: 14px; color: var(--navy-500); margin-top: var(--space-4); max-width: 280px; }
.ld-footer__nav { display: grid; gap: var(--space-8); }
@media (min-width: 640px) { .ld-footer__nav { grid-template-columns: repeat(3, 1fr); } }
.ld-footer__col h4 { font-size: 14px; font-weight: 600; color: var(--navy-300); margin-bottom: var(--space-5); }
.ld-footer__col ul { display: flex; flex-direction: column; gap: var(--space-3); }
.ld-footer__col a { font-size: 14px; color: var(--navy-500); transition: color 0.2s ease; }
.ld-footer__col a:hover { color: var(--neon-light); }
.ld-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); padding: var(--space-6) 0; font-size: 13px; color: var(--navy-600); }

/* ========== FLOAT ========== */
.ld-float { position: fixed; right: var(--space-6); bottom: var(--space-6); z-index: var(--z-float); display: none; }
@media (max-width: 1023px) { .ld-float { display: block; } }
.ld-float__btn { width: 60px; height: 60px; background: var(--neon); color: white; border-radius: 50%; box-shadow: 0 8px 24px var(--neon-glow); display: flex; align-items: center; justify-content: center; transition: all 0.3s ease; }
.ld-float__btn:hover { transform: scale(1.1); }
.ld-float__btn svg { stroke: currentColor; fill: none; stroke-width: 1.5; }

.ld-totop { position: fixed; right: var(--space-6); bottom: calc(var(--space-6) + 76px); width: 48px; height: 48px; background: var(--navy-800); color: var(--navy-300); border: 1px solid var(--navy-700); border-radius: 50%; z-index: var(--z-float); opacity: 0; visibility: hidden; transform: translateY(16px); transition: all 0.3s ease; display: flex; align-items: center; justify-content: center; }
.ld-totop.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.ld-totop:hover { background: var(--neon); border-color: var(--neon); color: white; }
.ld-totop svg { stroke: currentColor; fill: none; stroke-width: 2; }
@media (min-width: 1024px) { .ld-totop { bottom: var(--space-10); } }

/* ========== 动画减弱 ========== */
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; } }