:root {
  --sac-primary: #0F6B57;
  --sac-primary-dark: #0A4C3D;
  --sac-accent: #E0785A;
  --sac-accent-dark: #B85B3E;
  --sac-hero-btn: #E0785A;
  --sac-hero-btn-hover: #B85B3E;
  --sac-cta: #E0785A;
  --sac-bg: #ffffff;
  --sac-sub-bg: #EAF5F0;
  --sac-text: #0B241C;
  --sac-text2: #4A8A72;
  --sac-dark1: #073027;
  --sac-dark2: #0F6B57;
}
body { font-family: 'Helvetica Neue',Helvetica,Arial,'PingFang SC','Microsoft YaHei',sans-serif; color: var(--sac-text); background: var(--sac-bg); }
a { color: var(--sac-primary); text-decoration: none; }
a:hover { color: var(--sac-accent); }

/* Header */
.sac-header { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,.06); }
.sac-header .navbar-brand { font-weight: 800; font-size: 1.35rem; color: var(--sac-primary); }
.sac-header .nav-link { font-size: .92rem; color: var(--sac-text); font-weight: 500; }
.sac-header .nav-link:hover { color: var(--sac-accent); }
.sac-nav-cta { background: var(--sac-primary); color: #fff !important; border-radius: 8px; padding: .45rem 1.2rem !important; }
.sac-nav-cta:hover { background: var(--sac-accent); }

/* Notice Bar */
.sac-notice { background: linear-gradient(135deg,#0F6B57,#0A4C3D); color: #fff; font-weight: 500; padding: .6rem 0; }

/* Hero (左文右图) */
.sac-hero { background: linear-gradient(180deg, var(--sac-sub-bg) 0%, #fff 100%); padding: 4.5rem 0; }
.sac-hero .eyebrow { display: inline-block; background: var(--sac-primary); color: #fff; font-size: .82rem; font-weight: 700; letter-spacing: 1px; border-radius: 50px; padding: .35rem 1.1rem; margin-bottom: 1rem; }
.sac-hero h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.28; color: var(--sac-text); }
.sac-hero h1 em { font-style: normal; color: var(--sac-primary); }
.sac-hero p { font-size: 1.06rem; color: var(--sac-text2); max-width: 560px; margin: .9rem 0 1.4rem; }
.sac-hero-img img { width: 100%; border-radius: 20px; box-shadow: 0 18px 44px rgba(0,0,0,.14); object-fit: cover; aspect-ratio: 4/3; }
.sac-hero-btn { background: var(--sac-hero-btn); color: #fff; border-radius: 50px; padding: .75rem 2.3rem; font-weight: 600; display: inline-block; }
.sac-hero-btn:hover { background: var(--sac-hero-btn-hover); color: #fff; }
.sac-hero-outline { border: 2px solid var(--sac-primary); color: var(--sac-primary); border-radius: 50px; padding: .7rem 2rem; font-weight: 600; display: inline-block; }
.sac-hero-outline:hover { background: var(--sac-primary); color: #fff; }
.sac-hero-stat { display: flex; gap: 2.2rem; margin-top: 2rem; }
.sac-hero-stat .num { font-size: 1.55rem; font-weight: 800; color: var(--sac-primary); }
.sac-hero-stat .lbl { font-size: .85rem; color: var(--sac-text2); }

/* About (左图右文 + 特性 chip) */
.sac-about { padding: 4rem 0; background: #fff; }
.sac-about-img { border-radius: 18px; overflow: hidden; height: 100%; box-shadow: 0 10px 30px rgba(0,0,0,.10); }
.sac-about-img img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
.sac-about .en { display: block; font-size: .82rem; letter-spacing: 3px; color: var(--sac-accent); font-weight: 700; margin-bottom: .4rem; text-transform: uppercase; }
.sac-about p.lead-x { color: var(--sac-text2); font-size: .98rem; line-height: 1.9; }
.sac-chip { display: inline-block; background: var(--sac-sub-bg); color: var(--sac-primary); border-radius: 50px; padding: .4rem 1.1rem; font-size: .88rem; font-weight: 700; margin: 0 .4rem .4rem 0; }

/* Why Us (大图 + 4 图标砖) */
.sac-why { padding: 4rem 0; background: var(--sac-sub-bg); }
.sac-section-title { text-align: center; margin-bottom: 2.4rem; }
.sac-section-title h2 { font-weight: 800; color: var(--sac-text); }
.sac-section-title p { color: var(--sac-text2); }
.sac-section-title .en { display: block; font-size: .82rem; letter-spacing: 3px; color: var(--sac-accent); font-weight: 700; margin-bottom: .4rem; text-transform: uppercase; }
.sac-why-hero { position: relative; border-radius: 18px; overflow: hidden; min-height: 260px; display: flex; align-items: flex-end; margin-bottom: 1.5rem; }
.sac-why-hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.sac-why-hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(0,0,0,0) 35%, rgba(0,0,0,.72) 100%); }
.sac-why-cap { position: relative; z-index: 2; color: #fff; padding: 1.4rem 1.6rem; }
.sac-why-cap h3 { font-weight: 800; margin-bottom: .2rem; }
.sac-tile { background: #fff; border-radius: 14px; padding: 1.2rem 1.3rem; height: 100%; box-shadow: 0 2px 10px rgba(0,0,0,.04); }
.sac-tile i { color: var(--sac-primary); font-size: 1.35rem; margin-bottom: .55rem; display: block; }
.sac-tile h5 { font-weight: 700; font-size: 1rem; color: var(--sac-text); }
.sac-tile p { font-size: .85rem; color: var(--sac-text2); margin: 0; }

/* Global Signal (全球网络 + 区域 chip) */
.sac-signal { padding: 4rem 0; background: #fff; }
.sac-signal-img { border-radius: 18px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.10); }
.sac-signal-img img { width: 100%; height: 100%; object-fit: cover; min-height: 300px; }
.sac-region { background: var(--sac-sub-bg); border-radius: 12px; padding: .8rem 1.1rem; font-weight: 700; color: var(--sac-text); font-size: .9rem; display: inline-block; margin: 0 .5rem .5rem 0; }
.sac-region i { color: var(--sac-accent); margin-right: .4rem; }

/* Security (5 条目) */
.sac-security { padding: 4rem 0; background: var(--sac-sub-bg); }
.sac-sec-item { background: #fff; border-radius: 14px; padding: 1.15rem 1.3rem; height: 100%; box-shadow: 0 2px 8px rgba(0,0,0,.04); display: flex; gap: 1rem; align-items: flex-start; }
.sac-sec-ic { width: 46px; height: 46px; border-radius: 12px; background: var(--sac-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; }
.sac-sec-item h5 { font-weight: 800; margin-bottom: .15rem; }
.sac-sec-item p { font-size: .85rem; color: var(--sac-text2); margin: 0; }

/* FAQ (6 编号问答) */
.sac-faq { padding: 4rem 0; background: #fff; }
.sac-faq-item { background: var(--sac-sub-bg); border-radius: 14px; padding: 1.2rem 1.4rem; margin-bottom: 1rem; }
.sac-faq-q { display: flex; gap: .8rem; align-items: flex-start; }
.sac-faq-no { width: 32px; height: 32px; border-radius: 50%; background: var(--sac-primary); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: .9rem; flex-shrink: 0; }
.sac-faq-q h5 { font-weight: 800; margin: .1rem 0 .4rem; }
.sac-faq-item p { color: var(--sac-text2); font-size: .92rem; margin: 0; }

/* App CTA band (3 数据 + 双按钮 + 图) */
.sac-appband { background: linear-gradient(135deg,#0F6B57 0%,#073027 100%); padding: 4rem 0; color: #fff; }
.sac-appband h2 { font-weight: 800; }
.sac-appband p { opacity: .92; }
.sac-app-num { font-size: 1.6rem; font-weight: 900; }
.sac-app-lbl { font-size: .82rem; opacity: .8; }
.sac-btn-app { background: #fff; color: var(--sac-primary); border-radius: 50px; padding: .7rem 2.1rem; font-weight: 700; display: inline-block; }
.sac-btn-app:hover { opacity: .9; color: var(--sac-primary); }
.sac-btn-web { border: 2px solid rgba(255,255,255,.75); color: #fff; border-radius: 50px; padding: .65rem 1.9rem; font-weight: 600; display: inline-block; }
.sac-btn-web:hover { background: rgba(255,255,255,.15); color: #fff; }
.sac-appband img { width: 100%; border-radius: 18px; box-shadow: 0 14px 34px rgba(0,0,0,.28); object-fit: cover; aspect-ratio: 4/3; }

/* Latest news (6 摘要卡) */
.sac-news { padding: 4rem 0; background: var(--sac-sub-bg); }
.sac-news-card { background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 4px 16px rgba(0,0,0,.06); height: 100%; display: flex; flex-direction: column; border: 1px solid rgba(0,0,0,.05); }
.sac-news-card img { width: 100%; height: 165px; object-fit: cover; }
.sac-news-card .card-body { padding: 1rem 1.1rem; }
.sac-news-card h3 { font-size: 1rem; font-weight: 700; }
.sac-scroll { display: flex; gap: 1rem; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: .8rem; -webkit-overflow-scrolling: touch; }
.sac-scroll > * { scroll-snap-align: start; flex-shrink: 0; width: 320px; }

/* CTA Banner */
.sac-cta-banner { background: linear-gradient(135deg,#0F6B57 0%,#073027 100%); padding: 4rem 0; color: #fff; text-align: center; }
.sac-cta-banner h2 { font-weight: 800; }
.sac-btn-cta { background: var(--sac-cta); color: #1a1200; border-radius: 50px; padding: .7rem 2.5rem; font-weight: 700; display: inline-block; }
.sac-btn-cta:hover { opacity: .9; color: #1a1200; }
.sac-btn-outline-cta { border: 2px solid #fff; color: #fff; border-radius: 50px; padding: .65rem 2rem; display: inline-block; }
.sac-btn-outline-cta:hover { background: rgba(255,255,255,.15); color: #fff; }

/* Footer */
.sac-footer { background: var(--sac-dark1); color: #fff; padding: 3rem 0 1.5rem; }
.sac-footer h6 { text-transform: uppercase; font-weight: 700; margin-bottom: 1rem; }
.sac-footer a { color: rgba(255,255,255,.7); }
.sac-footer a:hover { color: var(--sac-cta); }
.sac-footer-copy { border-top: 1px solid rgba(255,255,255,.1); margin-top: 2rem; padding-top: 1.5rem; text-align: center; font-size: .85rem; color: rgba(255,255,255,.5); }

/* List page */
.sac-list-wrap { padding: 3rem 0; }
.sac-list-item { background: #fff; border-radius: 16px; padding: 1.5rem; margin-bottom: 1rem; box-shadow: 0 2px 8px rgba(0,0,0,.04); display: flex; gap: 1rem; align-items: center; }
.sac-list-item img { width: 120px; height: 80px; object-fit: cover; border-radius: 10px; }
.sac-list-item h4 a { color: var(--sac-text); }
.sac-list-item h4 a:hover { color: var(--sac-primary); }

/* Detail page */
.sac-detail { padding: 3rem 0; }
.sac-detail h1 { font-size: 1.8rem; font-weight: 800; color: var(--sac-text); margin-bottom: .8rem; }
.sac-detail-meta { font-size: .88rem; color: var(--sac-text2); margin-bottom: 1.5rem; display: flex; flex-wrap: wrap; gap: 14px; }
.sac-detail-body { line-height: 1.9; font-size: 1rem; color: var(--sac-text); }
.sac-detail-body img { max-width: 100%; height: auto; border-radius: 12px; margin: 1rem 0; }

/* Pagination */
.sac-pagination .page-link { color: var(--sac-primary); border-radius: 8px; margin: 0 3px; }
.sac-pagination .page-item.active .page-link { background: var(--sac-primary); border-color: var(--sac-primary); color: #fff; }

/* Badge */
.sac-badge { background: var(--sac-cta); color: #1a1200; font-size: .75rem; border-radius: 6px; padding: .3em .7em; }

/* Search */
.sac-search { padding: 3rem 0; }
.sac-search input { border-radius: 12px; }

/* User pages */
.sac-form-wrap { max-width: 500px; margin: 3rem auto; padding: 2rem; background: #fff; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,.06); }
.sac-form-submit { background: var(--sac-primary); color: #fff; border: none; border-radius: 10px; width: 100%; padding: .75rem; font-weight: 700; }
.sac-form-submit:hover { background: var(--sac-accent); }

/* 404 */
.sac-404 { text-align: center; padding: 5rem 0; }
.sac-404 h1 { font-size: 6rem; font-weight: 900; color: var(--sac-primary); }