/* home.css - home page only (hero carousel + announce + entrance + products + features + SLA + solutions + trust + news) */
/* =====================================================
   快捷入口 (.index-entrance, 4 卡)
   ===================================================== */
.byc-entrance { padding: 32px 0; background: #fff; border-bottom: 1px solid var(--byc-border); }
.byc-entrance-list {
  display: grid; gap: 16px; grid-template-columns: 1fr; list-style: none; margin: 0; padding: 0;
}
@media (min-width: 640px)  { .byc-entrance-list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .byc-entrance-list { grid-template-columns: repeat(4, 1fr); gap: 24px; } }
.byc-entrance-link {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px;
  border-radius: var(--byc-r-lg);
  transition: var(--byc-trans);
  color: inherit;
}
.byc-entrance-link:hover {
  background: var(--byc-bg-light);
  transform: translateY(-2px);
  box-shadow: var(--byc-sd-md);
}
.byc-entrance-ico {
  width: 64px; height: 64px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--byc-r-lg);
  flex-shrink: 0;
  transition: var(--byc-trans);
}
.byc-entrance-ico svg { width: 36px; height: 36px; }
/* 4 入口统一蓝色主调 — 唯一例外: 第 4 入口 "了解八艾云" 用强调橙以引导跳转 */
.byc-entrance-ico-1,
.byc-entrance-ico-2,
.byc-entrance-ico-3 { background: rgba(56,96,244,0.10); color: var(--byc-primary); }
.byc-entrance-ico-4 { background: rgba(255,106,0,0.10); color: var(--byc-accent); }
.byc-entrance-link:hover .byc-entrance-ico-1,
.byc-entrance-link:hover .byc-entrance-ico-2,
.byc-entrance-link:hover .byc-entrance-ico-3 { background: var(--byc-primary); color: #fff; }
.byc-entrance-link:hover .byc-entrance-ico-4 { background: var(--byc-accent); color: #fff; }
.byc-entrance-info { flex: 1; min-width: 0; }
.byc-entrance-info h3 {
  font-size: 16px; font-weight: 600; color: var(--byc-text); margin-bottom: 4px;
  transition: color 0.2s;
}
.byc-entrance-link:hover .byc-entrance-info h3 { color: var(--byc-primary); }
.byc-entrance-info p {
  font-size: 13px; color: var(--byc-text-sec); line-height: 1.5; margin: 0;
  overflow: hidden; text-overflow: ellipsis;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}
.byc-entrance-cta { color: var(--byc-accent); font-weight: 500; }



/* =====================================================
   Hero (4 slide 轮播 + 右侧 SVG 大插画)
   ===================================================== */
.byc-hero { position: relative; margin-top: -70px; padding-top: 70px; overflow: hidden; }

.byc-hero-bgs { position: absolute; top: 0; left: 0; right: 0; bottom: 0; z-index: 0; }
.byc-hero-bg { position: absolute; top: 0; left: 0; right: 0; bottom: 0; opacity: 0; transition: opacity 0.8s ease; }
.byc-hero-bg.is-active { opacity: 1; }

/* 蓝 */
.byc-hero-bg[data-theme="blue"] {
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(59,130,246,0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(99,102,241,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 40% 30% at 40% 80%, rgba(56,96,244,0.10) 0%, transparent 50%),
    linear-gradient(180deg, #F0F7FF 0%, #E8F3FF 50%, #DBEAFE 100%);
}
.byc-hero-bg[data-theme="blue"]::before {
  content: ''; position: absolute; top: -50%; right: -20%; width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(59,130,246,0.08) 0%, transparent 70%);
  animation: bycFloat 20s ease-in-out infinite;
}
.byc-hero-bg[data-theme="blue"]::after {
  content: ''; position: absolute; bottom: -30%; left: -10%; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(99,102,241,0.06) 0%, transparent 70%);
  animation: bycFloat 15s ease-in-out infinite reverse;
}
/* 紫 */
.byc-hero-bg[data-theme="purple"] {
  background:
    radial-gradient(ellipse 70% 50% at 30% 30%, rgba(139,92,246,0.15) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 70% 70%, rgba(168,85,247,0.12) 0%, transparent 50%),
    linear-gradient(180deg, #FAF5FF 0%, #F3E8FF 50%, #EDE9FE 100%);
}
.byc-hero-bg[data-theme="purple"]::before {
  content: ''; position: absolute; top: -40%; left: -15%; width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(139,92,246,0.10) 0%, transparent 70%);
  animation: bycFloat 18s ease-in-out infinite;
}
/* 青 */
.byc-hero-bg[data-theme="cyan"] {
  background:
    radial-gradient(ellipse 60% 50% at 10% 50%, rgba(6,182,212,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 80% 30%, rgba(34,211,238,0.10) 0%, transparent 50%),
    linear-gradient(180deg, #F0FDFF 0%, #E0FCFF 50%, #CFFAFE 100%);
}
.byc-hero-bg[data-theme="cyan"]::before {
  content: ''; position: absolute; top: -30%; right: -25%; width: 750px; height: 750px;
  background: radial-gradient(circle, rgba(6,182,212,0.10) 0%, transparent 70%);
  animation: bycFloat 22s ease-in-out infinite;
}
/* 橙 */
.byc-hero-bg[data-theme="orange"] {
  background:
    radial-gradient(ellipse 70% 50% at 80% 40%, rgba(251,146,60,0.12) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 20% 60%, rgba(249,115,22,0.10) 0%, transparent 50%),
    linear-gradient(180deg, #FFFBF5 0%, #FFF7ED 50%, #FFEDD5 100%);
}
.byc-hero-bg[data-theme="orange"]::before {
  content: ''; position: absolute; top: -35%; left: -20%; width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(251,146,60,0.10) 0%, transparent 70%);
  animation: bycFloat 19s ease-in-out infinite;
}
@keyframes bycFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25%      { transform: translate(20px, -30px) scale(1.05); }
  50%      { transform: translate(-10px, 20px) scale(0.95); }
  75%      { transform: translate(15px, 10px) scale(1.02); }
}
/* 网格装饰 */
.byc-hero-bgs::before {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,0,0,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.02) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* 右侧 SVG 大图 */
.byc-hero-art {
  position: absolute; top: 50%; right: 5%;
  transform: translateY(-50%);
  width: 45%; max-width: 480px; height: 360px;
  z-index: 2; pointer-events: none;
  display: none;
}
@media (min-width: 1024px) { .byc-hero-art { display: block; } }
@media (min-width: 1280px) { .byc-hero-art { width: 42%; max-width: 520px; height: 400px; right: 8%; } }
.byc-hero-art-item {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0; visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.byc-hero-art-item svg { width: 100%; height: 100%; }
.byc-hero-art-item.is-active { opacity: 1; visibility: visible; }
.byc-hero-art-item.is-active svg { animation: bycFloatSvg 5s ease-in-out infinite; }
@keyframes bycFloatSvg { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* 内容 */
.byc-hero-slides { position: relative; z-index: 2; }
.byc-hero-slide { display: none; padding: 70px 0 90px; }
.byc-hero-slide.is-active { display: block; }
.byc-hero-content { max-width: 100%; }
@media (min-width: 768px)  { .byc-hero-content { max-width: 520px; } }
@media (min-width: 1024px) { .byc-hero-content { max-width: 480px; } .byc-hero-slide { padding: 80px 0 100px; } }
@media (min-width: 1280px) { .byc-hero-content { max-width: 520px; } }

.byc-hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--byc-primary);
  color: #fff;
  font-size: 13px; font-weight: 600;
  border-radius: 4px;
  margin-bottom: 20px;
}
.byc-hero-title { font-size: 32px; font-weight: 700; color: var(--byc-text); line-height: 1.3; margin-bottom: 16px; }
@media (min-width: 768px)  { .byc-hero-title { font-size: 40px; } }
@media (min-width: 1024px) { .byc-hero-title { font-size: 48px; } }
.byc-hero-desc { font-size: 15px; color: var(--byc-text-sec); line-height: 1.8; margin-bottom: 28px; }
@media (min-width: 768px) { .byc-hero-desc { font-size: 16px; } }

.byc-hero-price { margin-bottom: 28px; }
.byc-hero-price-label { font-size: 14px; color: var(--byc-text-mut); }
.byc-hero-price-value { font-size: 42px; font-weight: 800; color: var(--byc-accent); line-height: 1; margin: 0 4px; }
@media (min-width: 768px) { .byc-hero-price-value { font-size: 52px; } }
.byc-hero-price-unit { font-size: 14px; color: var(--byc-text-mut); }

.byc-hero-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  background: var(--byc-grad-primary);
  color: #fff;
  font-size: 15px; font-weight: 600;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(56,96,244,0.3);
  transition: all 0.3s ease;
}
.byc-hero-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(56,96,244,0.4); color: #fff; }

.byc-hero-dots {
  position: absolute; bottom: 30px; left: 0; right: 0; z-index: 3;
  display: flex; justify-content: center; gap: 8px;
}
.byc-hero-dot {
  width: 8px; height: 8px;
  background: var(--byc-primary);
  opacity: 0.2; border-radius: 50%;
  padding: 0;
  transition: all 0.3s ease;
}
.byc-hero-dot:hover { opacity: 0.4; transform: scale(1.2); }
.byc-hero-dot.is-active { width: 32px; border-radius: 4px; opacity: 1; background: var(--byc-grad-primary); }

/* =====================================================
   Announce bar
   ===================================================== */
.byc-announce { background: #fff; border-bottom: 1px solid var(--byc-border); padding: 12px 0; }
.byc-announce-row { display: flex; align-items: center; gap: 16px; }
.byc-announce-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  background: var(--byc-primary); color: #fff;
  font-size: 13px; font-weight: 600;
  border-radius: var(--byc-r-full);
  white-space: nowrap; flex-shrink: 0;
}
.byc-announce-tag svg { width: 16px; height: 16px; }
.byc-announce-list-wrap { flex: 1; overflow: hidden; min-width: 0; }
.byc-announce-list { display: flex; gap: 32px; }
.byc-announce-list li { flex-shrink: 0; }
.byc-announce-list a { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--byc-text-sec); transition: color 0.2s; }
.byc-announce-list a:hover { color: var(--byc-primary); }
.byc-announce-date { color: var(--byc-text-mut); font-size: 13px; }
.byc-announce-title { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.byc-announce-more { font-size: 13px; font-weight: 500; color: var(--byc-primary); white-space: nowrap; }
.byc-announce-more:hover { color: var(--byc-primary-dark); }

/* =====================================================
   Domain search
   ===================================================== */
.byc-domain { padding: 60px 0; background: #fff; }
.byc-domain-inner { max-width: 880px; margin: 0 auto; text-align: center; }
.byc-domain-title { font-size: 22px; font-weight: 700; color: var(--byc-text); margin-bottom: 24px; }
.byc-domain-bar {
  display: flex; align-items: stretch;
  background: #fff;
  border: 1px solid var(--byc-border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(56,96,244,0.10);
}
.byc-domain-input { flex: 1; padding: 0 18px; height: 56px; border: none; outline: none; font-size: 15px; color: var(--byc-text); }
.byc-domain-tld { width: 100px; height: 56px; border: none; border-left: 1px solid var(--byc-border); padding: 0 12px; font-size: 15px; background: #fff; color: var(--byc-text); }
.byc-domain-btn { width: 140px; background: var(--byc-grad-primary); color: #fff; font-size: 16px; font-weight: 600; border: none; transition: filter 0.2s; }
.byc-domain-btn:hover { filter: brightness(1.1); }
.byc-domain-tabs { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.byc-domain-tab { padding: 6px 16px; background: var(--byc-bg-light); border: 1px solid var(--byc-border); border-radius: var(--byc-r-full); font-size: 13px; color: var(--byc-text-sec); }
.byc-domain-tab:hover, .byc-domain-tab.is-active { color: #fff; background: var(--byc-primary); border-color: var(--byc-primary); }


/* =====================================================
   Products Grid (8 卡)
   ===================================================== */
.byc-prods { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 640px)  { .byc-prods { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .byc-prods { grid-template-columns: repeat(4, 1fr); } }

.byc-prod-card {
  background: #fff;
  border: 1px solid var(--byc-border);
  border-radius: var(--byc-r-xl);
  padding: 24px;
  transition: all 0.3s ease;
  position: relative; overflow: hidden;
  display: block;
}
.byc-prod-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--byc-grad-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s;
}
.byc-prod-card:hover { border-color: var(--byc-primary-100); transform: translateY(-6px); box-shadow: var(--byc-sd-lg); }
.byc-prod-card:hover::before { transform: scaleX(1); }
.byc-prod-card.is-featured { background: linear-gradient(180deg, var(--byc-primary-50) 0%, #fff 100%); border-color: var(--byc-primary-100); }

.byc-prod-ico {
  width: 56px; height: 56px; border-radius: var(--byc-r-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  transition: var(--byc-trans);
}
.byc-prod-ico svg { width: 28px; height: 28px; }
.byc-prod-card:hover .byc-prod-ico { transform: scale(1.10); }
.byc-prod-title { display: flex; align-items: center; gap: 8px; font-size: 18px; font-weight: 600; color: var(--byc-text); margin-bottom: 8px; }
.byc-tag-hot { display: inline-block; padding: 1px 8px; background: var(--byc-primary); color: #fff; font-size: 11px; font-weight: 700; border-radius: 4px; letter-spacing: 0.5px; }
.byc-prod-desc { font-size: 13px; color: var(--byc-text-sec); line-height: 1.6; margin-bottom: 20px; min-height: 42px; }
.byc-prod-price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 20px; }
.byc-prod-price-cur { font-size: 14px; font-weight: 600; color: var(--byc-accent); }
.byc-prod-price-num { font-size: 30px; font-weight: 700; color: var(--byc-accent); line-height: 1; }
.byc-prod-price-unit { font-size: 13px; color: var(--byc-text-mut); }
.byc-prod-btn {
  display: flex; align-items: center; justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 14px; font-weight: 600;
  color: var(--byc-primary);
  background: var(--byc-primary-50);
  border-radius: var(--byc-r-md);
  transition: var(--byc-trans);
}
.byc-prod-card:hover .byc-prod-btn { color: #fff; background: var(--byc-grad-primary); }


/* =====================================================
   SLA stats row
   ===================================================== */
.byc-sla { padding: 56px 0; background: var(--byc-grad-primary); color: #fff; }
.byc-sla-row { display: grid; gap: 24px; grid-template-columns: 1fr; text-align: center; }
@media (min-width: 768px) { .byc-sla-row { grid-template-columns: repeat(3, 1fr); } }
.byc-sla-item strong { display: block; font-size: 48px; font-weight: 800; line-height: 1.1; }
.byc-sla-item strong sup { font-size: 22px; font-weight: 600; opacity: 0.85; }
.byc-sla-label { display: block; font-size: 16px; font-weight: 500; margin-top: 8px; }
.byc-sla-sub { display: block; font-size: 13px; color: rgba(255,255,255,0.7); margin-top: 4px; }

/* =====================================================
   Solutions Grid (深色)
   ===================================================== */
.byc-sols { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 768px)  { .byc-sols { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .byc-sols { grid-template-columns: repeat(5, 1fr); } }
.byc-sol-card {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--byc-r-xl);
  padding: 28px 24px;
  transition: all 0.3s ease;
  color: #fff;
  display: block;
}
.byc-sol-card:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.25); transform: translateY(-6px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.byc-sol-ico {
  width: 56px; height: 56px; border-radius: var(--byc-r-lg);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.byc-sol-ico svg { width: 28px; height: 28px; }
.byc-sol-card h3 { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 10px; }
.byc-sol-card p { font-size: 14px; color: rgba(255,255,255,0.7); line-height: 1.6; margin-bottom: 16px; }
.byc-sol-link { font-size: 14px; font-weight: 500; color: var(--byc-primary-light); transition: transform 0.2s; display: inline-block; }
.byc-sol-card:hover .byc-sol-link { transform: translateX(6px); }

/* =====================================================
   Trust / Cert
   ===================================================== */
.byc-trust { display: grid; gap: 24px; grid-template-columns: 1fr; margin-bottom: 36px; }
@media (min-width: 768px) { .byc-trust { grid-template-columns: repeat(3, 1fr); } }
.byc-trust-card {
  background: #fff;
  border: 1px solid var(--byc-border);
  border-radius: var(--byc-r-xl);
  padding: 28px 24px;
  text-align: center;
  transition: var(--byc-trans);
}
.byc-trust-card:hover { border-color: var(--byc-primary-100); box-shadow: var(--byc-sd-md); transform: translateY(-4px); }
.byc-trust-ico { width: 64px; height: 64px; margin: 0 auto 16px; }
.byc-trust-ico svg { width: 64px; height: 64px; }
.byc-trust-card h3 { font-size: 17px; font-weight: 600; color: var(--byc-text); margin-bottom: 8px; }
.byc-trust-card p { font-size: 13px; color: var(--byc-text-sec); line-height: 1.6; }

.byc-certs { display: flex; flex-wrap: wrap; justify-content: center; gap: 16px; }
.byc-cert {
  min-width: 120px;
  padding: 16px 24px;
  background: #fff;
  border: 1px solid var(--byc-border);
  border-radius: var(--byc-r-md);
  font-size: 14px; font-weight: 600;
  color: var(--byc-text-sec);
  text-align: center;
  transition: var(--byc-trans);
}
.byc-cert:hover { border-color: var(--byc-primary); color: var(--byc-primary); }


/* =====================================================
   News (3 cards)
   ===================================================== */
.byc-news { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 768px) { .byc-news { grid-template-columns: repeat(3, 1fr); } }
.byc-news-card {
  background: #fff;
  border: 1px solid var(--byc-border);
  border-radius: var(--byc-r-xl);
  overflow: hidden;
  transition: all 0.3s ease;
}
.byc-news-card:hover { transform: translateY(-6px); box-shadow: var(--byc-sd-lg); border-color: rgba(56,96,244,0.2); }
.byc-news-head { display: flex; align-items: center; gap: 12px; padding: 20px; background: var(--byc-bg-light); border-bottom: 1px solid var(--byc-border); }
.byc-news-ico { width: 40px; height: 40px; border-radius: var(--byc-r-md); display: flex; align-items: center; justify-content: center; }
.byc-news-ico svg { width: 20px; height: 20px; }
.byc-news-cat { font-size: 16px; font-weight: 600; color: var(--byc-text); }
.byc-news-list { padding: 8px 20px 20px; list-style: none; margin: 0; }
.byc-news-list li { border-bottom: 1px solid var(--byc-border); }
.byc-news-list li:last-child { border-bottom: none; }
.byc-news-list a { display: flex; align-items: center; gap: 12px; padding: 12px 0; transition: var(--byc-trans); }
.byc-news-list a:hover { padding-left: 6px; }
.byc-news-date { flex-shrink: 0; padding: 2px 8px; background: var(--byc-bg-light); border-radius: var(--byc-r-sm); font-size: 12px; color: var(--byc-text-mut); }
.byc-news-title { font-size: 14px; color: var(--byc-text-sec); line-height: 1.5; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: var(--byc-trans); }
.byc-news-list a:hover .byc-news-title { color: var(--byc-primary); }


/* ============================================================
   首页范式
   7 个 section: banner / 公告 / 快捷入口 / 云产品 5卡 / 方案 / 服务平台 / 控制台 / 新闻
   ============================================================ */

/* 公共: 标题 */
.byc-8a-cp-head { text-align: center; margin-bottom: 36px; padding: 0 20px; }
.byc-8a-cp-title { font-size: 30px; font-weight: 600; color: #292929; margin: 0 0 12px; line-height: 1.4; }
.byc-8a-cp-title span { color: #2B6DE8; }
.byc-8a-cp-desc { font-size: 15px; color: #888; margin: 0; }

/* 3D icon 图片范式 (home.html 18 处 inline SVG 撤为 img 引用 JPG)
   引用 /static/web/img/3d-icons/*.jpg (sharp 导出, byc/tools/export-3d-icons.js) */
.byc-3d-img {
  width: 100%;
  height: auto;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
}

/* 1. Hero Banner (UCloud 范式: 白底 + 主蓝 #3860F4 + 极浅蓝点缀) */
.byc-hero-new { position: relative; padding: 70px 0 0; overflow: hidden; background: linear-gradient(180deg, #EAF0FE 0%, #F5F7FE 60%, #fff 100%); }
.byc-hero-new-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    radial-gradient(ellipse 50% 40% at 78% 30%, rgba(56,96,244,0.18) 0%, transparent 65%),
    radial-gradient(ellipse 55% 45% at 12% 75%, rgba(56,96,244,0.10) 0%, transparent 65%),
    linear-gradient(rgba(56,96,244,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,96,244,.05) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
}
.byc-hero-new-row { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; min-height: 460px; padding-bottom: 60px; }
.byc-hero-new-text { padding: 30px 20px; }
.byc-hero-new-text h1 { font-size: 42px; font-weight: 700; color: #1A2655; margin: 0 0 18px; line-height: 1.3; letter-spacing: .5px; }
.byc-hero-new-text p { font-size: 15px; color: #4d5d7a; margin: 0 0 30px; line-height: 1.7; max-width: 480px; }
.byc-hero-new-btn {
  display: inline-block;
  padding: 13px 42px;
  background: linear-gradient(135deg, #3860F4 0%, #1E3FCC 100%);
  color: #fff;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 6px 16px rgba(56,96,244,.30);
  transition: all .2s;
}
.byc-hero-new-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(56,96,244,.40); color: #fff; }
.byc-hero-new-art { display: flex; justify-content: center; align-items: center; }
.byc-hero-new-art svg { width: 100%; max-width: 540px; height: auto; display: block; }

/* 公告横条 (浅色, 跟 hero 同色调) */
.byc-hero-new-announce { background: rgba(255,255,255,.6); backdrop-filter: blur(8px); border-top: 1px solid rgba(255,255,255,.6); border-bottom: 1px solid rgba(199,216,245,.6); position: relative; z-index: 2; }
.byc-hero-new-announce .byc-container { display: flex; align-items: center; gap: 18px; height: 48px; padding: 0 20px; }
.byc-hero-new-an-tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; background: rgba(74,123,216,.12); color: #3860F4; border-radius: 12px; font-size: 12px; font-weight: 500; flex-shrink: 0; }
.byc-hero-new-an-tag .ico { width: 12px; height: 12px; display: block; background-color: currentColor; -webkit-mask-position: center; mask-position: center; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; -webkit-mask-size: contain; mask-size: contain; -webkit-mask-image: var(--byc-ico); mask-image: var(--byc-ico); }
.ico-hero-announce { --byc-ico: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M2 6h2l8-4v12L4 10H2V6z'/></svg>"); }
.byc-hero-new-announce ul { flex: 1; display: flex; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; overflow: hidden; }
.byc-hero-new-announce li { font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.byc-hero-new-announce a { color: #4d4d4d; transition: color .15s; }
.byc-hero-new-announce li a:hover { color: #3860F4; }
.byc-hero-new-announce li span { color: #3860F4; margin-right: 6px; font-weight: 500; }
.byc-hero-new-an-more { color: #888; font-size: 13px; flex-shrink: 0; }
.byc-hero-new-an-more:hover { color: #3860F4; }

/* 2. 快捷入口 (dn23 范式: 白底卡 + 蓝色圆形 icon + 横排 4 卡) */
.byc-quick-entry { background: linear-gradient(180deg, #DDE8F9 0%, #F5F7FA 100%); padding: 30px 0 50px; }
.byc-quick-entry .byc-container ul { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; list-style: none; padding: 0 20px; margin: 0; }
.byc-quick-entry li { display: flex; }
.byc-quick-entry a {
  display: flex; align-items: center; gap: 16px;
  background: #fff;
  border: 1px solid #E5EAF3;
  border-radius: 8px;
  padding: 20px 22px;
  flex: 1;
  text-decoration: none;
  transition: all .2s;
}
.byc-quick-entry a:hover { border-color: #3860F4; box-shadow: 0 8px 22px rgba(74,123,216,.12); transform: translateY(-2px); }
.byc-qe-ico { flex-shrink: 0; width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; }
.byc-qe-ico svg { width: 100%; height: 100%; display: block; }
.byc-qe-text h3 { font-size: 15px; font-weight: 600; color: #1A2655; margin: 0 0 4px; }
.byc-qe-text p { font-size: 12px; color: #888; margin: 0; line-height: 1.5; }

/* 3. 云产品 6 卡 (dn23 范式: 2x3 网格, 左文右 3D isometric 插画, 白底浅灰边框) */
.byc-prod-grid { padding: 50px 0 70px; background: #F5F7FA; }
.byc-sec-h2 { text-align: center; margin-bottom: 36px; padding: 0 20px; }
.byc-sec-h2 h2 { font-size: 28px; font-weight: 600; color: #1A2655; margin: 0 0 10px; }
.byc-sec-h2 p { font-size: 14px; color: #888; margin: 0; }
.byc-pg-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; padding: 0 20px; }
.byc-pg-card {
  position: relative;
  display: flex; align-items: center;
  background: #fff;
  border: 1px solid #E5EAF3;
  border-radius: 10px;
  padding: 24px 22px;
  text-decoration: none;
  transition: all .25s;
  overflow: hidden;
  min-height: 180px;
}
.byc-pg-card:hover { border-color: #3860F4; box-shadow: 0 10px 28px rgba(74,123,216,.14); transform: translateY(-3px); }
.byc-pg-text { flex: 1; padding-right: 12px; }
.byc-pg-card h3 { font-size: 17px; font-weight: 600; color: #1A2655; margin: 0 0 6px; }
.byc-pg-card p { font-size: 12px; color: #888; margin: 0 0 12px; line-height: 1.5; }
.byc-pg-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.byc-pg-chips span {
  padding: 2px 9px;
  background: #F0F5FC;
  color: #3860F4;
  border: 1px solid #D6E4FA;
  border-radius: 3px;
  font-size: 11px;
}
.byc-pg-price { color: #ff4d00; font-size: 13px; }
.byc-pg-price strong { font-size: 26px; font-weight: 700; line-height: 1; margin: 0 2px; }
.byc-pg-price span { font-size: 12px; color: #888; margin-left: 4px; }
.byc-pg-hot {
  position: absolute; top: 0; right: 0;
  padding: 4px 12px 4px 14px;
  background: linear-gradient(135deg, #ff6a00, #ed4014);
  color: #fff;
  font-size: 11px; font-weight: 500;
  border-radius: 0 10px 0 10px;
}
.byc-pg-art { flex-shrink: 0; width: 150px; height: 130px; display: flex; align-items: center; justify-content: center; }
.byc-pg-art svg { width: 100%; height: 100%; display: block; }

/* 4. 方案定制 */
.byc-8a-scheme { padding: 60px 0; background: #fff; }
.byc-8a-scheme-list {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  list-style: none; padding: 0 20px; margin: 0;
}
.byc-8a-scheme-list li {
  background: #fff;
  border: 1px solid #e5eaf3;
  border-radius: 8px;
  padding: 30px 24px;
  text-align: center;
  transition: all .25s;
}
.byc-8a-scheme-list li:hover { border-color: #2B6DE8; transform: translateY(-4px); box-shadow: 0 10px 24px rgba(56,96,244,.12); }
.byc-8a-scheme-pic { width: 80px; height: 80px; margin: 0 auto 18px; display: flex; align-items: center; justify-content: center; }
.byc-8a-scheme-list h3 { font-size: 17px; font-weight: 600; color: #292929; margin: 0 0 14px; }
.byc-8a-scheme-list p { font-size: 13px; color: #888; line-height: 1.7; margin: 0; }

/* 5. 服务平台 */
.byc-8a-service-map { padding: 60px 0; background: #f5f7fa; }
.byc-8a-sm-box { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; padding: 0 20px; }
.byc-8a-sm-map { background: #fff; border-radius: 12px; padding: 30px; box-shadow: 0 4px 20px rgba(0,0,0,.06); }
.byc-8a-sm-map svg { width: 100%; height: auto; display: block; }
.byc-8a-sm-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 24px; }
.byc-8a-sm-list li { display: flex; align-items: flex-start; gap: 18px; background: #fff; border: 1px solid #e5eaf3; border-radius: 8px; padding: 22px 24px; transition: all .2s; }
.byc-8a-sm-list li:hover { border-color: #2B6DE8; box-shadow: 0 6px 18px rgba(56,96,244,.1); }
.byc-8a-sm-circle { flex-shrink: 0; width: 56px; height: 56px; border-radius: 12px; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(56,96,244,.20); }
.byc-8a-sm-circle svg { width: 32px; height: 32px; }
.byc-8a-sm-c1 { background: linear-gradient(135deg, #3860F4, #6B85F8); }
.byc-8a-sm-c2 { background: linear-gradient(135deg, #3860F4, #6B85F8); }
.byc-8a-sm-c3 { background: linear-gradient(135deg, #3860F4, #6B85F8); }
.byc-8a-sm-list h3 { font-size: 16px; font-weight: 600; color: #292929; margin: 0 0 8px; }
.byc-8a-sm-list p { font-size: 13px; color: #888; margin: 0; line-height: 1.6; }

/* 6. 控制台 */
.byc-8a-control { padding: 60px 0; background: #fff; }
.byc-8a-ctrl-row { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; padding: 0 20px; }
.byc-8a-ctrl-title { font-size: 28px; font-weight: 600; color: #292929; margin: 0 0 28px; line-height: 1.4; }
.byc-8a-ctrl-list { list-style: none; padding: 0; margin: 0; }
.byc-8a-ctrl-list li { margin-bottom: 8px; }
.byc-8a-ctrl-h { display: flex; align-items: center; gap: 8px; font-size: 16px; font-weight: 600; color: #2B6DE8; margin: 16px 0 8px; }
.byc-8a-ctrl-ico { display: inline-block; width: 6px; height: 6px; background: #ff6a00; border-radius: 50%; }
.byc-8a-ctrl-s { color: #4d4d4d; font-size: 13px; line-height: 2; padding-left: 14px; }
.byc-8a-ctrl-pic { background: linear-gradient(135deg, #f0f6ff 0%, #fff 100%); border-radius: 12px; padding: 30px; }
.byc-8a-ctrl-pic svg { width: 100%; height: auto; display: block; }

/* 7. 新闻 (8a dl/dt/dd 多分类) */
.byc-8a-news { padding: 60px 0; background: #f5f7fa; }
.byc-8a-news-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; padding: 0 20px; }
.byc-8a-news-cat { background: #fff; border: 1px solid #e5eaf3; border-radius: 8px; padding: 20px 24px; margin: 0; }
.byc-8a-news-cat dt { font-size: 16px; font-weight: 600; padding-bottom: 14px; margin-bottom: 14px; border-bottom: 2px solid #f0f3f5; position: relative; }
.byc-8a-news-cat dt::after { content: ''; position: absolute; left: 0; bottom: -2px; width: 40px; height: 2px; }
.byc-8a-news-dt-1::after { background: #3860F4; }
.byc-8a-news-dt-2::after { background: #3860F4; }
.byc-8a-news-dt-3::after { background: #3860F4; }
.byc-8a-news-cat dt a { color: #292929; }
.byc-8a-news-cat dt a:hover { color: #2B6DE8; }
.byc-8a-news-cat dd { margin: 0; }
.byc-8a-news-cat dd p { display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 13px; border-bottom: 1px dashed #f0f3f5; margin: 0; }
.byc-8a-news-cat dd p:last-child { border-bottom: none; }
.byc-8a-news-cat dd span { flex-shrink: 0; padding: 1px 8px; background: #f0f6ff; color: #2B6DE8; border-radius: 3px; font-size: 11px; }
.byc-8a-news-cat dd a { color: #4d4d4d; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.byc-8a-news-cat dd a:hover { color: #2B6DE8; }

/* 响应式 */
@media (max-width: 1024px) {
  .byc-8a-cp-list { grid-template-columns: repeat(2, 1fr); }
  .byc-8a-entrance .byc-container { grid-template-columns: repeat(2, 1fr); }
  .byc-8a-scheme-list { grid-template-columns: repeat(2, 1fr); }
  .byc-8a-sm-box { grid-template-columns: 1fr; }
  .byc-8a-ctrl-row { grid-template-columns: 1fr; }
  .byc-8a-news-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .byc-8a-cp-list { grid-template-columns: 1fr; }
  .byc-8a-entrance .byc-container { grid-template-columns: 1fr; }
  .byc-8a-scheme-list { grid-template-columns: 1fr; }
  .byc-8a-banner-text h2 { font-size: 28px; }
  .byc-8a-cp-title { font-size: 22px; }
  .byc-8a-ctrl-title { font-size: 22px; }
}