/* ==================================================================
   SiteForge 前台样式系统 · 双主题（浅色 / 深色毛玻璃）
   ================================================================== */

/* ---------- 主题变量 ---------- */
:root {
  --sf-radius: 16px;
  --sf-radius-sm: 10px;
  --sf-radius-lg: 24px;
  --sf-wrap: 1200px;
  --sf-font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --sf-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* 浅色主题 */
body.t-light {
  --sf-bg: #f7f9fc;
  --sf-bg-2: #ffffff;
  --sf-soft: #eef3f9;
  --sf-card: #ffffff;
  --sf-card-2: #ffffff;
  --sf-card-border: #e3e9f1;
  --sf-glass: rgba(255, 255, 255, 0.72);
  --sf-text: #101828;
  --sf-text-2: #475467;
  --sf-text-3: #8b97a8;
  --sf-line: #e6ebf2;
  --sf-brand: #0f4c75;
  --sf-brand-2: #1b7fa8;
  --sf-brand-soft: #e8f2f8;
  --sf-brand-ink: #ffffff;
  --sf-ok: #12b76a;
  --sf-warn: #f79009;
  --sf-shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --sf-shadow: 0 1px 3px rgba(16, 24, 40, 0.06), 0 12px 28px rgba(16, 24, 40, 0.07);
  --sf-shadow-lg: 0 2px 6px rgba(16, 24, 40, 0.06), 0 24px 56px rgba(16, 24, 40, 0.12);
  --sf-hero-bg: radial-gradient(1200px 520px at 12% -10%, #e4eff8 0%, transparent 62%),
    radial-gradient(900px 420px at 92% 8%, #e9f6f4 0%, transparent 58%);
  --sf-head-bg: rgba(255, 255, 255, 0.82);
}

/* 深色主题（毛玻璃） */
body.t-dark {
  --sf-bg: #070b14;
  --sf-bg-2: #0b1220;
  --sf-soft: rgba(148, 178, 220, 0.06);
  --sf-card: rgba(20, 28, 44, 0.66);
  --sf-card-2: rgba(24, 34, 52, 0.8);
  --sf-card-border: rgba(140, 170, 220, 0.16);
  --sf-glass: rgba(16, 23, 38, 0.62);
  --sf-text: #eef3fb;
  --sf-text-2: #a9b6cb;
  --sf-text-3: #6f7f99;
  --sf-line: rgba(140, 170, 220, 0.14);
  --sf-brand: #46b8f0;
  --sf-brand-2: #5eead4;
  --sf-brand-soft: rgba(70, 184, 240, 0.12);
  --sf-brand-ink: #04141f;
  --sf-ok: #34d399;
  --sf-warn: #fbbf24;
  --sf-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --sf-shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 16px 40px rgba(0, 0, 0, 0.5);
  --sf-shadow-lg: 0 2px 8px rgba(0, 0, 0, 0.5), 0 32px 70px rgba(0, 0, 0, 0.6);
  --sf-hero-bg: radial-gradient(1100px 520px at 10% -12%, rgba(70, 184, 240, 0.18) 0%, transparent 60%),
    radial-gradient(900px 460px at 92% 4%, rgba(94, 234, 212, 0.12) 0%, transparent 58%);
  --sf-head-bg: rgba(8, 13, 24, 0.72);
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sf-font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--sf-text);
  background: var(--sf-bg);
  -webkit-font-smoothing: antialiased;
}

body.t-dark::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(70, 184, 240, 0.08), transparent 60%),
    radial-gradient(700px 500px at 0% 100%, rgba(94, 234, 212, 0.06), transparent 60%);
}

img { max-width: 100%; height: auto; display: block; border-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.35em; }
li { margin-bottom: 0.35em; }

::selection { background: var(--sf-brand); color: var(--sf-brand-ink); }

/* ---------- 布局 ---------- */
.sf-wrap {
  width: 100%;
  max-width: var(--sf-wrap);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.sf-main { position: relative; z-index: 1; }

.sf-sec--soft { background: var(--sf-soft); }
.sf-sec--brand { background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2)); color: var(--sf-brand-ink); }
.sf-sec--brand .sf-head__title, .sf-sec--brand .sf-head__sub, .sf-sec--brand .sf-head__eyebrow { color: inherit; }
.sf-sec--bare { background: transparent; }

.sf-block { padding: 68px 0; }
.sf-block--hero, .sf-block--page_hero { padding: 0; }

/* ---------- 顶部导航 ---------- */
.sf-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--sf-head-bg);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--sf-line);
}

.sf-header__inner {
  display: flex;
  align-items: center;
  gap: 22px;
  height: 72px;
}

.sf-brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }

.sf-brand__mark {
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2));
  color: var(--sf-brand-ink);
  font-weight: 800; font-size: 17px;
  box-shadow: var(--sf-shadow-sm);
  flex: 0 0 auto;
}
.sf-brand__mark img { width: 100%; height: 100%; object-fit: contain; border-radius: 12px; }
.sf-brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.sf-brand__name { font-weight: 800; font-size: 17px; letter-spacing: -0.02em; }
.sf-brand__sub { font-size: 11px; color: var(--sf-text-3); letter-spacing: 0.06em; text-transform: uppercase; }

.sf-nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.sf-nav > a {
  padding: 9px 14px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--sf-text-2);
  transition: background 0.18s, color 0.18s;
  white-space: nowrap;
}
.sf-nav > a:hover { color: var(--sf-text); background: var(--sf-soft); }
.sf-nav > a.is-active { color: var(--sf-brand); background: var(--sf-brand-soft); }

.sf-header__cta { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }

.sf-phone-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2));
  color: var(--sf-brand-ink);
  font-weight: 700; font-size: 14.5px;
  box-shadow: var(--sf-shadow-sm);
  transition: transform 0.18s, box-shadow 0.18s;
  white-space: nowrap;
}
.sf-phone-btn:hover { transform: translateY(-1px); box-shadow: var(--sf-shadow); }

.sf-theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  border: 1px solid var(--sf-card-border);
  background: var(--sf-card);
  color: var(--sf-text-2);
  cursor: pointer;
  transition: background 0.18s, color 0.18s;
  font-size: 16px;
}
.sf-theme-toggle:hover { color: var(--sf-text); background: var(--sf-soft); }

.sf-burger { display: none; }

/* ---------- 标题区 ---------- */
.sf-head { margin-bottom: 40px; max-width: 780px; }
.sf-head.is-center { margin-left: auto; margin-right: auto; text-align: center; }

.sf-head__eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--sf-brand-soft);
  color: var(--sf-brand);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.sf-head__title { font-size: clamp(24px, 3.2vw, 34px); margin-bottom: 12px; }
.sf-head__sub { margin: 0; color: var(--sf-text-2); font-size: 15.5px; }

.sf-muted { color: var(--sf-text-3); }

/* ---------- 按钮 ---------- */
.sf-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px;
  border-radius: 12px;
  font-weight: 650; font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s, box-shadow 0.18s, background 0.18s, color 0.18s;
  white-space: nowrap;
}
.sf-btn--primary {
  background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2));
  color: var(--sf-brand-ink);
  box-shadow: var(--sf-shadow-sm);
}
.sf-btn--primary:hover { transform: translateY(-2px); box-shadow: var(--sf-shadow); }
.sf-btn--ghost { background: var(--sf-card); color: var(--sf-text); border-color: var(--sf-card-border); }
.sf-btn--ghost:hover { border-color: var(--sf-brand); color: var(--sf-brand); }
.sf-btn--link { padding: 13px 4px; color: var(--sf-brand); }
.sf-btn--link:hover { gap: 12px; }
.sf-btn--sm { padding: 9px 18px; font-size: 14px; border-radius: 10px; }

/* ---------- Hero ---------- */
.sf-hero { position: relative; overflow: hidden; background: var(--sf-hero-bg); padding: 76px 0 68px; }
.sf-hero--img { color: #fff; }
.sf-hero__bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0.5; z-index: 0;
}
.sf-hero--img .sf-hero__bg { opacity: 0.62; }
.sf-hero--img::after {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(100deg, rgba(6, 12, 24, 0.86), rgba(6, 12, 24, 0.42));
}
.sf-hero .sf-wrap { position: relative; z-index: 1; }

.sf-hero__grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 56px; align-items: center; }
.sf-hero__grid.is-stack { grid-template-columns: 1fr; gap: 36px; }
.sf-hero__grid.is-minimal { grid-template-columns: 1fr; gap: 0; }
.sf-hero__grid.is-center { text-align: center; }
.sf-hero__grid.is-center .sf-hero__actions { justify-content: center; }
.sf-hero__grid.is-center .sf-hero__kicker { margin-left: auto; margin-right: auto; }

.sf-hero__kicker {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 20px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--sf-card);
  border: 1px solid var(--sf-card-border);
  color: var(--sf-text-2);
  font-size: 13px; font-weight: 600;
  backdrop-filter: blur(10px);
}
.sf-hero--img .sf-hero__kicker { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.24); color: #fff; }

.sf-hero h1 { font-size: clamp(30px, 4.6vw, 52px); line-height: 1.18; margin-bottom: 20px; letter-spacing: -0.025em; }
.sf-hero__sub { font-size: 17px; line-height: 1.7; color: var(--sf-text-2); max-width: 620px; margin-bottom: 22px; }
.sf-hero__grid.is-center .sf-hero__sub { margin-left: auto; margin-right: auto; }

.sf-hero__strip {
  margin: 0 0 30px;
  padding-top: 18px;
  border-top: 1px dashed var(--sf-line);
  font-size: 13.5px;
  color: var(--sf-text-3);
}
.sf-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }

.sf-hero__features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.sf-hero__feature {
  padding: 20px;
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  border: 1px solid var(--sf-card-border);
  box-shadow: var(--sf-shadow-sm);
  backdrop-filter: blur(14px);
  transition: transform 0.2s, box-shadow 0.2s;
}
.sf-hero__feature:hover { transform: translateY(-3px); box-shadow: var(--sf-shadow); }
.sf-hero__feature i { display: block; font-size: 22px; font-style: normal; margin-bottom: 10px; }
.sf-hero__feature strong { display: block; font-size: 15.5px; margin-bottom: 6px; }
.sf-hero__feature span { display: block; font-size: 13.5px; line-height: 1.65; color: var(--sf-text-2); }

/* ---------- 内页头图 ---------- */
.sf-pagehero {
  position: relative;
  padding: 54px 0 48px;
  background: var(--sf-hero-bg);
  border-bottom: 1px solid var(--sf-line);
  overflow: hidden;
}
.sf-pagehero__bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.28; }
.sf-pagehero .sf-wrap { position: relative; z-index: 1; }
.sf-pagehero h1 { font-size: clamp(26px, 3.6vw, 40px); margin-bottom: 12px; }
.sf-pagehero__sub { color: var(--sf-text-2); font-size: 16px; max-width: 720px; margin: 0; }
.sf-crumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; font-size: 13.5px; color: var(--sf-text-3); }
.sf-crumb a:hover { color: var(--sf-brand); }
.sf-crumb span.sep { opacity: 0.5; }

/* ---------- 卡片网格 ---------- */
.sf-grid { display: grid; gap: 20px; }
.sf-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sf-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sf-grid--4 { grid-template-columns: repeat(4, 1fr); }

.sf-card {
  background: var(--sf-card);
  border: 1px solid var(--sf-card-border);
  border-radius: var(--sf-radius);
  box-shadow: var(--sf-shadow-sm);
  transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.sf-card:hover { transform: translateY(-4px); box-shadow: var(--sf-shadow); border-color: color-mix(in srgb, var(--sf-brand) 35%, var(--sf-card-border)); }

.sf-card__media { aspect-ratio: 16 / 10; background: var(--sf-soft); overflow: hidden; position: relative; }
.sf-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.sf-card:hover .sf-card__media img { transform: scale(1.05); }
.sf-card__badge {
  position: absolute; top: 12px; left: 12px;
  padding: 4px 10px; border-radius: 999px;
  background: var(--sf-brand); color: var(--sf-brand-ink);
  font-size: 12px; font-weight: 700;
}
.sf-card__body { padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.sf-card__title { font-size: 16.5px; font-weight: 700; }
.sf-card__desc { color: var(--sf-text-2); font-size: 14px; line-height: 1.7; margin: 0; flex: 1; }
.sf-card__foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-top: 6px; }
.sf-card__more { color: var(--sf-brand); font-size: 13.5px; font-weight: 650; display: inline-flex; align-items: center; gap: 6px; }
.sf-card:hover .sf-card__more { gap: 10px; }
.sf-card__price { font-weight: 800; color: var(--sf-brand); font-size: 16px; }
.sf-card__meta { font-size: 12.5px; color: var(--sf-text-3); display: flex; gap: 10px; align-items: center; }
.sf-chip {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: var(--sf-brand-soft); color: var(--sf-brand);
  font-size: 12px; font-weight: 650;
}

/* ---------- 特性块 ---------- */
.sf-feature { padding: 26px 22px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); transition: transform 0.2s, box-shadow 0.2s; backdrop-filter: blur(14px); }
.sf-feature:hover { transform: translateY(-4px); box-shadow: var(--sf-shadow); }
.sf-feature i, .sf-feature .ico { display: block; font-size: 26px; font-style: normal; margin-bottom: 14px; line-height: 1; }
.sf-feature strong { display: block; font-size: 16px; margin-bottom: 8px; }
.sf-feature span, .sf-feature p { display: block; color: var(--sf-text-2); font-size: 14px; line-height: 1.7; margin: 0; }
.sf-feature--plain { background: transparent; border-color: transparent; box-shadow: none; padding: 0; }
.sf-feature--line { background: transparent; border: none; box-shadow: none; padding: 0 0 0 18px; border-left: 3px solid var(--sf-brand); border-radius: 0; }

/* ---------- 数据指标 ---------- */
.sf-stats { display: grid; gap: 18px; }
.sf-stats--brand .sf-stat { background: var(--sf-card); border-color: var(--sf-card-border); }
.sf-stat { padding: 26px 22px; border-radius: var(--sf-radius); text-align: center; border: 1px solid var(--sf-card-border); background: var(--sf-card); backdrop-filter: blur(14px); }
.sf-stat__value { font-size: clamp(30px, 4vw, 42px); font-weight: 800; line-height: 1.1; letter-spacing: -0.03em; color: var(--sf-brand); }
.sf-stat__value small { font-size: 0.5em; font-weight: 700; margin-left: 2px; }
.sf-stat__label { display: block; margin-top: 8px; color: var(--sf-text-2); font-size: 14px; }
.sf-sec--brand .sf-stat { background: rgba(255, 255, 255, 0.12); border-color: rgba(255, 255, 255, 0.22); }
.sf-sec--brand .sf-stat__value, .sf-sec--brand .sf-stat__label { color: inherit; }

/* ---------- 关于我们 ---------- */
.sf-about { display: grid; grid-template-columns: 1fr 340px; gap: 44px; align-items: start; }
.sf-about__copy { font-size: 15.5px; color: var(--sf-text-2); }
.sf-about__copy h3 { color: var(--sf-text); font-size: 19px; margin: 26px 0 12px; }
.sf-about__copy h2 { color: var(--sf-text); font-size: 22px; margin: 28px 0 12px; }
.sf-about__copy strong { color: var(--sf-text); }
.sf-about__copy a { color: var(--sf-brand); text-decoration: underline; text-underline-offset: 3px; }

.sf-entity {
  padding: 26px;
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  border: 1px solid var(--sf-card-border);
  box-shadow: var(--sf-shadow-sm);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 96px;
}
.sf-entity h3 { font-size: 16px; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 1px solid var(--sf-line); }
.sf-entity dl { margin: 0; display: grid; grid-template-columns: 76px 1fr; gap: 12px 14px; font-size: 14px; }
.sf-entity dt { color: var(--sf-text-3); font-size: 13.5px; }
.sf-entity dd { margin: 0; font-weight: 600; word-break: break-word; }
.sf-entity dd a { color: var(--sf-brand); }

/* ---------- 场景 / 保障 ---------- */
.sf-icon-card { padding: 26px 22px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s; }
.sf-icon-card:hover { transform: translateY(-4px); box-shadow: var(--sf-shadow); border-color: color-mix(in srgb, var(--sf-brand) 35%, var(--sf-card-border)); }
.sf-icon-card i { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 13px; background: var(--sf-brand-soft); font-size: 22px; font-style: normal; margin-bottom: 14px; }
.sf-icon-card strong { display: block; font-size: 16px; margin-bottom: 8px; }
.sf-icon-card p { margin: 0; color: var(--sf-text-2); font-size: 14px; line-height: 1.7; }

.sf-num-card { position: relative; padding: 30px 24px 26px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); transition: transform 0.2s, box-shadow 0.2s; overflow: hidden; }
.sf-num-card:hover { transform: translateY(-4px); box-shadow: var(--sf-shadow); }
.sf-num-card b { position: absolute; top: 14px; right: 18px; font-size: 42px; font-weight: 800; line-height: 1; color: var(--sf-brand); opacity: 0.14; letter-spacing: -0.04em; }
.sf-num-card strong { display: block; font-size: 16.5px; margin-bottom: 10px; }
.sf-num-card p { margin: 0; color: var(--sf-text-2); font-size: 14px; line-height: 1.7; }

/* ---------- 流程步骤 ---------- */
.sf-steps { display: grid; gap: 18px; position: relative; counter-reset: step; }
.sf-steps--arrow, .sf-steps--dot { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.sf-step { position: relative; padding: 24px 22px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); }
.sf-step__idx { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2)); color: var(--sf-brand-ink); font-weight: 800; font-size: 14px; margin-bottom: 14px; }
.sf-step strong { display: block; font-size: 16px; margin-bottom: 8px; }
.sf-step p { margin: 0; color: var(--sf-text-2); font-size: 14px; line-height: 1.7; }
.sf-steps--arrow .sf-step:not(:last-child)::after {
  content: ""; position: absolute; top: 40px; right: -14px;
  width: 10px; height: 10px;
  border-top: 2px solid var(--sf-brand); border-right: 2px solid var(--sf-brand);
  transform: rotate(45deg); opacity: 0.55;
}

/* ---------- 新闻列表 ---------- */
.sf-news-list { display: grid; gap: 14px; }
.sf-news-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 22px 24px;
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  border: 1px solid var(--sf-card-border);
  box-shadow: var(--sf-shadow-sm);
  backdrop-filter: blur(14px);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.sf-news-item:hover { transform: translateY(-3px); box-shadow: var(--sf-shadow); border-color: color-mix(in srgb, var(--sf-brand) 35%, var(--sf-card-border)); }
.sf-news-item__meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--sf-text-3); }
.sf-news-item__title { font-size: 17px; font-weight: 700; }
.sf-news-item__desc { margin: 0; color: var(--sf-text-2); font-size: 14px; line-height: 1.7; }
.sf-news-item__more { color: var(--sf-brand); font-size: 13.5px; font-weight: 650; }

.sf-news-feature { display: grid; grid-template-columns: 1.05fr 1fr; gap: 20px; }
.sf-news-feature .sf-card:first-child { }

/* ---------- FAQ ---------- */
.sf-faq { display: grid; gap: 12px; max-width: 900px; margin: 0 auto; }
.sf-faq__item { border: 1px solid var(--sf-card-border); border-radius: var(--sf-radius); background: var(--sf-card); overflow: hidden; backdrop-filter: blur(14px); transition: border-color 0.2s, box-shadow 0.2s; }
.sf-faq__item[open] { border-color: color-mix(in srgb, var(--sf-brand) 40%, var(--sf-card-border)); box-shadow: var(--sf-shadow-sm); }
.sf-faq__q {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 650; font-size: 15.5px;
  list-style: none;
  position: relative;
}
.sf-faq__q::-webkit-details-marker { display: none; }
.sf-faq__q::before {
  content: "?";
  flex: 0 0 auto;
  display: grid; place-items: center;
  width: 24px; height: 24px; border-radius: 8px;
  background: var(--sf-brand-soft); color: var(--sf-brand);
  font-size: 13px; font-weight: 800;
}
.sf-faq__q::after {
  content: "+"; margin-left: auto; color: var(--sf-text-3);
  font-size: 20px; font-weight: 400; line-height: 1;
  transition: transform 0.2s;
}
.sf-faq__item[open] .sf-faq__q::after { transform: rotate(45deg); }
.sf-faq__a { padding: 0 22px 20px 60px; color: var(--sf-text-2); font-size: 14.5px; line-height: 1.8; }
.sf-faq__a p:last-child { margin-bottom: 0; }

/* ---------- 对比 ---------- */
.sf-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.sf-compare__col { padding: 26px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); }
.sf-compare__col.is-good { border-color: color-mix(in srgb, var(--sf-brand) 45%, var(--sf-card-border)); background: color-mix(in srgb, var(--sf-brand-soft) 60%, var(--sf-card)); }
.sf-compare__col h3 { font-size: 17px; margin-bottom: 16px; }
.sf-compare__col ul { margin: 0; padding: 0; list-style: none; }
.sf-compare__col li { padding: 9px 0 9px 26px; position: relative; font-size: 14.5px; color: var(--sf-text-2); border-bottom: 1px dashed var(--sf-line); }
.sf-compare__col li:last-child { border-bottom: none; }
.sf-compare__col li::before { content: "•"; position: absolute; left: 8px; color: var(--sf-brand); font-weight: 800; }

/* ---------- 价格套餐 ---------- */
.sf-pricing { display: grid; gap: 20px; align-items: stretch; }
.sf-plan { display: flex; flex-direction: column; padding: 30px 26px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); position: relative; backdrop-filter: blur(14px); transition: transform 0.2s, box-shadow 0.2s; }
.sf-plan:hover { transform: translateY(-4px); box-shadow: var(--sf-shadow); }
.sf-plan.is-hot { border-color: var(--sf-brand); box-shadow: var(--sf-shadow); }
.sf-plan__tag { position: absolute; top: -11px; left: 26px; padding: 3px 12px; border-radius: 999px; background: var(--sf-brand); color: var(--sf-brand-ink); font-size: 12px; font-weight: 700; }
.sf-plan__name { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.sf-plan__desc { color: var(--sf-text-2); font-size: 13.5px; margin-bottom: 18px; min-height: 40px; }
.sf-plan__price { font-size: 32px; font-weight: 800; letter-spacing: -0.03em; color: var(--sf-brand); margin-bottom: 4px; }
.sf-plan__price small { font-size: 14px; font-weight: 600; color: var(--sf-text-3); margin-left: 4px; }
.sf-plan__features { list-style: none; margin: 20px 0 24px; padding: 0; flex: 1; }
.sf-plan__features li { display: flex; gap: 10px; padding: 7px 0; font-size: 14px; color: var(--sf-text-2); }
.sf-plan__features li::before { content: "✓"; color: var(--sf-ok); font-weight: 800; flex: 0 0 auto; }

/* ---------- 图文内容 ---------- */
.sf-richtext { font-size: 16px; line-height: 1.85; color: var(--sf-text-2); }
.sf-richtext h1, .sf-richtext h2 { color: var(--sf-text); font-size: 24px; margin: 34px 0 14px; }
.sf-richtext h3 { color: var(--sf-text); font-size: 19px; margin: 28px 0 12px; }
.sf-richtext h4 { color: var(--sf-text); font-size: 16.5px; margin: 22px 0 10px; }
.sf-richtext img { border-radius: var(--sf-radius-sm); margin: 18px 0; }
.sf-richtext strong { color: var(--sf-text); }
.sf-richtext a { color: var(--sf-brand); text-decoration: underline; text-underline-offset: 3px; }
.sf-richtext blockquote { margin: 20px 0; padding: 16px 22px; border-left: 4px solid var(--sf-brand); background: var(--sf-brand-soft); border-radius: 0 var(--sf-radius-sm) var(--sf-radius-sm) 0; }
.sf-richtext table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 14.5px; }
.sf-richtext th, .sf-richtext td { padding: 11px 14px; border: 1px solid var(--sf-line); text-align: left; }
.sf-richtext th { background: var(--sf-soft); font-weight: 700; color: var(--sf-text); }
.sf-richtext--narrow { max-width: 820px; margin: 0 auto; }
.sf-card-pad { padding: 34px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); }

/* ---------- 画廊 ---------- */
.sf-gallery { display: grid; gap: 14px; }
.sf-gallery img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--sf-radius-sm); }
.sf-gallery--masonry { column-count: 3; column-gap: 14px; display: block; }
.sf-gallery--masonry img { margin-bottom: 14px; break-inside: avoid; }

/* ---------- 视频 ---------- */
.sf-video { position: relative; border-radius: var(--sf-radius); overflow: hidden; background: #000; box-shadow: var(--sf-shadow); }
.sf-video iframe, .sf-video video { display: block; width: 100%; height: 100%; border: 0; }

/* ---------- 表格 ---------- */
.sf-table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: var(--sf-card); border-radius: var(--sf-radius); overflow: hidden; box-shadow: var(--sf-shadow-sm); }
.sf-table th, .sf-table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--sf-line); }
.sf-table th { background: var(--sf-soft); font-weight: 700; }
.sf-table--striped tbody tr:nth-child(even) { background: var(--sf-soft); }

/* ---------- CTA ---------- */
.sf-cta { padding: 52px 44px; border-radius: var(--sf-radius-lg); text-align: center; position: relative; overflow: hidden; }
.sf-cta--brand { background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2)); color: var(--sf-brand-ink); box-shadow: var(--sf-shadow); }
.sf-cta--soft { background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(16px); }
.sf-cta--dark { background: linear-gradient(135deg, #0d1524, #152238); color: #eef3fb; box-shadow: var(--sf-shadow); }
.sf-cta__bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.2; }
.sf-cta > * { position: relative; z-index: 1; }
.sf-cta h2 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 12px; }
.sf-cta p { max-width: 620px; margin: 0 auto 26px; opacity: 0.92; }
.sf-cta__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.sf-cta--brand .sf-btn--ghost { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.3); color: #fff; }
.sf-cta--brand .sf-btn--ghost:hover { background: rgba(255, 255, 255, 0.22); color: #fff; }

/* ---------- 标签 ---------- */
.sf-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.sf-tag { padding: 7px 15px; border-radius: 999px; font-size: 13.5px; background: var(--sf-soft); color: var(--sf-text-2); transition: all 0.18s; }
.sf-tag:hover { background: var(--sf-brand); color: var(--sf-brand-ink); }
.sf-tag--line { background: transparent; border: 1px solid var(--sf-card-border); }
.sf-tag--solid { background: var(--sf-brand); color: var(--sf-brand-ink); }

.sf-linkgrid { display: grid; gap: 8px 20px; grid-template-columns: repeat(4, 1fr); font-size: 14px; }
.sf-linkgrid a { color: var(--sf-text-2); padding: 4px 0; transition: color 0.16s; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sf-linkgrid a:hover { color: var(--sf-brand); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 联系我们 ---------- */
.sf-contact { display: grid; grid-template-columns: 1fr 1.15fr; gap: 34px; align-items: start; }
.sf-contact__info { display: grid; gap: 14px; }
.sf-contact__item { display: flex; gap: 14px; padding: 18px 20px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); }
.sf-contact__item i { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: var(--sf-brand-soft); font-size: 19px; font-style: normal; flex: 0 0 auto; }
.sf-contact__item b { display: block; font-size: 13px; color: var(--sf-text-3); font-weight: 600; }
.sf-contact__item span { font-size: 15px; font-weight: 650; word-break: break-word; }

.sf-formbox { padding: 32px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(16px); }
.sf-formbox h3 { font-size: 19px; margin-bottom: 8px; }
.sf-formbox__hint { color: var(--sf-text-3); font-size: 13.5px; margin-bottom: 20px; }
.sf-field { margin-bottom: 14px; }
.sf-field label { display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 6px; color: var(--sf-text-2); }
.sf-input, .sf-textarea, .sf-select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--sf-radius-sm);
  border: 1px solid var(--sf-card-border);
  background: var(--sf-bg-2);
  color: var(--sf-text);
  font: inherit;
  font-size: 14.5px;
  transition: border-color 0.16s, box-shadow 0.16s;
}
.sf-input:focus, .sf-textarea:focus, .sf-select:focus {
  outline: none;
  border-color: var(--sf-brand);
  box-shadow: 0 0 0 3px var(--sf-brand-soft);
}
.sf-textarea { min-height: 110px; resize: vertical; }
.sf-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.sf-form__msg { font-size: 13.5px; margin: 10px 0 0; min-height: 20px; }
.sf-form__msg.is-ok { color: var(--sf-ok); }
.sf-form__msg.is-err { color: #e5484d; }
.sf-form .sf-btn { width: 100%; margin-top: 6px; }

/* ---------- 页脚 ---------- */
.sf-footer { margin-top: 0; padding: 52px 0 34px; background: var(--sf-soft); border-top: 1px solid var(--sf-line); position: relative; z-index: 1; }
body.t-dark .sf-footer { background: var(--sf-bg-2); }
.sf-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; margin-bottom: 34px; }
.sf-footer h4 { font-size: 15px; margin-bottom: 16px; }
.sf-footer p, .sf-footer li { color: var(--sf-text-2); font-size: 14px; }
.sf-footer ul { list-style: none; margin: 0; padding: 0; }
.sf-footer li { margin-bottom: 9px; }
.sf-footer a:hover { color: var(--sf-brand); }
.sf-footer__bottom { padding-top: 22px; border-top: 1px solid var(--sf-line); display: flex; flex-wrap: wrap; gap: 10px 20px; justify-content: space-between; font-size: 13px; color: var(--sf-text-3); }
.sf-footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }

/* ---------- 分页 ---------- */
.sf-pager { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 40px; }
.sf-pager__item { min-width: 40px; height: 40px; padding: 0 14px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; border: 1px solid var(--sf-card-border); background: var(--sf-card); color: var(--sf-text-2); font-size: 14px; font-weight: 600; transition: all 0.16s; }
.sf-pager__item:hover { border-color: var(--sf-brand); color: var(--sf-brand); }
.sf-pager__item.is-active { background: var(--sf-brand); border-color: var(--sf-brand); color: var(--sf-brand-ink); }

/* ---------- 文章详情 ---------- */
.sf-article { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 44px; align-items: start; }
.sf-article__meta { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; font-size: 13.5px; color: var(--sf-text-3); padding-bottom: 20px; margin-bottom: 26px; border-bottom: 1px solid var(--sf-line); }
.sf-article__body { font-size: 16px; }
.sf-sidebar { display: grid; gap: 18px; position: sticky; top: 96px; }
.sf-sidecard { padding: 24px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-sm); backdrop-filter: blur(14px); }
.sf-sidecard h3 { font-size: 15.5px; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--sf-line); }
.sf-sidecard__list { list-style: none; margin: 0; padding: 0; }
.sf-sidecard__list li { margin-bottom: 14px; }
.sf-sidecard__list a { font-size: 14px; color: var(--sf-text-2); display: block; line-height: 1.55; }
.sf-sidecard__list a:hover { color: var(--sf-brand); }
.sf-sidecard__list time { display: block; font-size: 12px; color: var(--sf-text-3); margin-top: 4px; }
.sf-sidecard__cta { background: linear-gradient(135deg, var(--sf-brand), var(--sf-brand-2)); color: var(--sf-brand-ink); border: none; }
.sf-sidecard__cta h3 { border-color: rgba(255, 255, 255, 0.24); }
.sf-sidecard__cta p { font-size: 13.5px; margin-bottom: 16px; opacity: 0.94; }
.sf-sidecard__cta .sf-phone { display: block; font-size: 20px; font-weight: 800; margin-bottom: 14px; letter-spacing: -0.02em; }
.sf-sidecard__cta .sf-btn--ghost { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.32); color: #fff; width: 100%; }

/* ---------- 浮动咨询 ---------- */
.sf-float { position: fixed; right: 22px; bottom: 22px; z-index: 200; display: flex; flex-direction: column; gap: 10px; align-items: flex-end; }
.sf-float__btn { width: 50px; height: 50px; border-radius: 15px; display: grid; place-items: center; background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow); color: var(--sf-text-2); font-size: 20px; cursor: pointer; transition: transform 0.18s, color 0.18s; backdrop-filter: blur(14px); }
.sf-float__btn:hover { transform: translateY(-2px); color: var(--sf-brand); }
.sf-float__panel { width: 320px; padding: 22px; border-radius: var(--sf-radius); background: var(--sf-card); border: 1px solid var(--sf-card-border); box-shadow: var(--sf-shadow-lg); backdrop-filter: blur(20px); display: none; }
.sf-float__panel.is-open { display: block; }
.sf-float__panel h3 { font-size: 16px; margin-bottom: 6px; }
.sf-float__panel p { font-size: 13px; color: var(--sf-text-3); margin-bottom: 14px; }
.sf-float__panel .sf-input, .sf-float__panel .sf-textarea { margin-bottom: 10px; font-size: 14px; }

/* ---------- 底部移动呼叫条 ---------- */
.sf-mobile-bar { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .sf-about { grid-template-columns: 1fr; }
  .sf-entity { position: static; }
  .sf-article { grid-template-columns: 1fr; }
  .sf-sidebar { position: static; }
  .sf-hero__grid { grid-template-columns: 1fr; gap: 36px; }
  .sf-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sf-footer__grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}

@media (max-width: 860px) {
  .sf-nav { display: none; }
  .sf-nav.is-open {
    display: flex; flex-direction: column; align-items: stretch;
    position: absolute; top: 72px; left: 0; right: 0;
    padding: 12px 20px 20px;
    background: var(--sf-card);
    border-bottom: 1px solid var(--sf-line);
    box-shadow: var(--sf-shadow);
    backdrop-filter: blur(20px);
  }
  .sf-nav.is-open > a { padding: 13px 12px; border-radius: 10px; font-size: 15.5px; }
  .sf-burger { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--sf-card-border); background: var(--sf-card); color: var(--sf-text); cursor: pointer; font-size: 18px; }
  .sf-header__cta .sf-phone-btn span { display: none; }
  .sf-phone-btn { padding: 11px 14px; }
  .sf-grid--3, .sf-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sf-contact { grid-template-columns: 1fr; }
  .sf-compare { grid-template-columns: 1fr; }
  .sf-news-feature { grid-template-columns: 1fr; }
  .sf-steps--arrow .sf-step::after { display: none; }
  .sf-block { padding: 48px 0; }
  .sf-hero { padding: 54px 0 48px; }
  .sf-cta { padding: 38px 24px; }
  .sf-formbox, .sf-card-pad, .sf-entity { padding: 24px; }
  .sf-mobile-bar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 190;
    background: var(--sf-card); border-top: 1px solid var(--sf-line);
    backdrop-filter: blur(20px); padding: 10px 14px; gap: 10px;
  }
  .sf-mobile-bar .sf-btn { flex: 1; }
  .sf-float { bottom: 78px; right: 14px; }
  body { padding-bottom: 68px; }
}

@media (max-width: 620px) {
  .sf-wrap { padding: 0 16px; }
  .sf-grid--2, .sf-grid--3, .sf-grid--4 { grid-template-columns: 1fr; }
  .sf-hero__features { grid-template-columns: 1fr; }
  .sf-form-row { grid-template-columns: 1fr; }
  .sf-linkgrid { grid-template-columns: repeat(2, 1fr); }
  .sf-footer__grid { grid-template-columns: 1fr; }
  .sf-brand__sub { display: none; }
  .sf-faq__a { padding-left: 22px; }
  .sf-gallery--masonry { column-count: 2; }
}

@media print {
  .sf-header, .sf-footer, .sf-float, .sf-mobile-bar { display: none; }
}