/* === 第5套：红色活力风格 === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --r1: #991b1b;
  --r2: #dc2626;
  --r3: #ef4444;
  --r4: #fca5a5;
  --r5: #fee2e2;
  --r6: #fff5f5;
  --tx: #111827;
  --mu: #6b7280;
  --bd: #e5e7eb;
}

html { scroll-behavior: smooth; }
body { font-family: "PingFang SC","Microsoft YaHei","Segoe UI",sans-serif; color: var(--tx); background: #fff; line-height: 1.7; }

/* ===== 顶部公告 ===== */
.ann { background: var(--r2); color: #fff; text-align: center; padding: 9px 16px; font-size: 13px; font-weight: 500; }
.ann a { color: #fca5a5; text-decoration: underline; }

/* ===== 导航 - 白底下划线 ===== */
header { background: #fff; border-bottom: 3px solid var(--r2); position: sticky; top: 0; z-index: 999; }
.nav { max-width: 1180px; margin: 0 auto; padding: 0 28px; height: 64px; display: flex; align-items: center; }
.logo-mark { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-right: 40px; }
.logo-sq { width: 40px; height: 40px; background: var(--r2); border-radius: 6px; display: flex; align-items: center; justify-content: center; }
.logo-sq svg { width: 24px; height: 24px; }
.logo-name { font-size: 20px; font-weight: 900; color: var(--r2); letter-spacing: -0.5px; }
.nav-tabs { display: flex; gap: 0; list-style: none; margin-right: auto; }
.nav-tabs li a { display: block; padding: 10px 18px; text-decoration: none; color: var(--mu); font-size: 14px; font-weight: 500; border-bottom: 3px solid transparent; margin-bottom: -3px; transition: color 0.15s, border-color 0.15s; }
.nav-tabs li a:hover { color: var(--r2); }
.nav-tabs li a.cur { color: var(--r2); border-bottom-color: var(--r2); font-weight: 700; }
.nav-act { background: var(--r2); color: #fff; border: none; border-radius: 8px; padding: 10px 22px; font-size: 14px; font-weight: 700; cursor: pointer; transition: background 0.15s; }
.nav-act:hover { background: var(--r1); }

/* ===== 工具 ===== */
main { padding-top: 0; }
.w { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.s { padding: 80px 0; }
.ss { padding: 52px 0; }
.pill { display: inline-block; background: var(--r5); color: var(--r2); font-size: 12px; font-weight: 800; padding: 4px 14px; border-radius: 100px; margin-bottom: 10px; letter-spacing: 0.5px; }
h2.hd { font-size: 34px; font-weight: 900; line-height: 1.25; margin-bottom: 14px; }
.sd { font-size: 17px; color: var(--mu); }
.ct { text-align: center; }

/* ===== Hero - 大色块分割 ===== */
.hero { display: grid; grid-template-columns: 1fr 1fr; min-height: 520px; }
.hero-l { background: var(--r2); color: #fff; padding: 80px 48px; display: flex; flex-direction: column; justify-content: center; }
.hero-kw { font-size: 12px; letter-spacing: 2.5px; color: var(--r4); font-weight: 800; text-transform: uppercase; margin-bottom: 16px; }
.hero-l h1 { font-size: clamp(32px, 3.5vw, 54px); font-weight: 900; line-height: 1.1; letter-spacing: -1.5px; margin-bottom: 18px; }
.hero-l p { font-size: 17px; color: rgba(255,255,255,0.8); margin-bottom: 32px; line-height: 1.7; }
.hero-dl { display: inline-flex; align-items: center; gap: 10px; background: #fff; color: var(--r2); border: none; border-radius: 10px; padding: 15px 34px; font-size: 17px; font-weight: 800; cursor: pointer; box-shadow: 0 6px 20px rgba(0,0,0,0.18); transition: transform 0.15s, box-shadow 0.15s; }
.hero-dl:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,0.22); }
.hero-hint { font-size: 12px; color: rgba(255,255,255,0.5); margin-top: 12px; }
.hero-r { background: var(--r6); display: flex; align-items: center; justify-content: center; padding: 40px; }
.hero-r-inner { max-width: 380px; width: 100%; }
.quick-dl-box { background: #fff; border-radius: 16px; padding: 32px; box-shadow: 0 4px 24px rgba(220,38,38,0.1); }
.quick-dl-box h3 { font-size: 17px; font-weight: 800; margin-bottom: 4px; }
.quick-dl-box .qv { font-size: 13px; color: var(--mu); margin-bottom: 18px; }
.quick-dl-btn { width: 100%; background: var(--r2); color: #fff; border: none; border-radius: 10px; padding: 14px; font-size: 16px; font-weight: 700; cursor: pointer; transition: background 0.15s; margin-bottom: 10px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.quick-dl-btn:hover { background: var(--r1); }
.other-platforms { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
.op { border: 1px solid var(--bd); border-radius: 8px; padding: 10px 0; text-align: center; cursor: pointer; font-size: 13px; font-weight: 600; color: var(--tx); background: #fff; transition: border-color 0.15s; }
.op:hover { border-color: var(--r2); color: var(--r2); }

/* ===== 数据横条 ===== */
.data-strip { background: var(--r1); color: #fff; padding: 32px 0; }
.ds-row { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 10px; }
.ds-item { text-align: center; }
.ds-n { font-size: 38px; font-weight: 900; line-height: 1; }
.ds-l { font-size: 13px; opacity: 0.7; margin-top: 4px; }

/* ===== 特性（2列大卡片）===== */
.feats { background: #fff; }
.f2g { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.fc { border: 1px solid var(--bd); border-radius: 14px; padding: 30px 26px; display: flex; gap: 18px; transition: box-shadow 0.2s, border-color 0.2s; }
.fc:hover { border-color: var(--r3); box-shadow: 0 6px 24px rgba(220,38,38,0.08); }
.fc-icon { width: 52px; height: 52px; border-radius: 12px; background: var(--r5); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.fc-icon svg { width: 28px; height: 28px; }
.fc-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.fc-body p { font-size: 14px; color: var(--mu); line-height: 1.7; }

/* ===== 产品深度 ===== */
.depth { background: var(--r6); }
.depth-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 72px; }
.depth-grid:last-child { margin-bottom: 0; }
.depth-img { height: 280px; border-radius: 16px; background: linear-gradient(135deg, var(--r5) 0%, var(--r4) 100%); display: flex; align-items: center; justify-content: center; }
.depth-txt h3 { font-size: 26px; font-weight: 800; margin-bottom: 14px; }
.depth-txt p { font-size: 15px; color: var(--mu); margin-bottom: 12px; line-height: 1.8; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip { background: var(--r5); color: var(--r2); font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 6px; }

/* ===== 对比表（主要模块，放在前面）===== */
.cmp { background: #fff; }
.cmp-t { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--bd); border-radius: 12px; overflow: hidden; box-shadow: 0 2px 16px rgba(0,0,0,0.05); }
.cmp-t th { background: var(--r2); color: #fff; padding: 14px 20px; font-size: 14px; text-align: left; }
.cmp-t th:first-child { background: var(--r1); }
.cmp-t td { padding: 12px 20px; font-size: 14px; border-bottom: 1px solid var(--r6); }
.cmp-t tr:last-child td { border-bottom: none; }
.cmp-t tr:nth-child(even) td { background: var(--r6); }
.g { color: #059669; font-weight: 700; }
.b { color: #dc2626; font-weight: 700; }
.y { color: #d97706; font-weight: 600; }

/* ===== 平台下载 ===== */
.plat { background: var(--r6); }
.pg { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.pc { background: #fff; border-radius: 14px; padding: 24px 16px; text-align: center; border: 1px solid var(--bd); }
.pc:first-child { border: 2px solid var(--r2); box-shadow: 0 4px 16px rgba(220,38,38,0.1); }
.pc svg { width: 44px; height: 44px; margin-bottom: 12px; }
.pc h3 { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.pc .pi { font-size: 12px; color: var(--mu); margin-bottom: 14px; line-height: 1.5; }
.dl-b { width: 100%; background: var(--r2); color: #fff; border: none; border-radius: 8px; padding: 10px 0; font-size: 14px; font-weight: 700; cursor: pointer; transition: background 0.15s; }
.dl-b:hover { background: var(--r1); }

/* ===== 评价 ===== */
.rvs { background: #fff; }
.rg { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.rc { border: 1px solid var(--bd); border-radius: 12px; padding: 22px; }
.rt { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.ra { width: 40px; height: 40px; border-radius: 8px; background: var(--r2); color: #fff; font-size: 18px; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.rn { font-size: 14px; font-weight: 700; }
.rr { font-size: 12px; color: var(--mu); }
.stars { display: flex; gap: 2px; margin-bottom: 9px; }
.stars svg { width: 15px; height: 15px; fill: #f59e0b; }
.rc p { font-size: 14px; color: var(--mu); line-height: 1.7; }

/* ===== FAQ ===== */
.faq { background: var(--r6); }
.fw { max-width: 800px; margin: 0 auto; }
.fi { background: #fff; border-radius: 12px; margin-bottom: 8px; border: 1px solid var(--bd); overflow: hidden; }
.fi input { display: none; }
.fl { display: flex; justify-content: space-between; align-items: center; padding: 18px 22px; cursor: pointer; font-size: 15px; font-weight: 600; }
.fl svg { width: 20px; height: 20px; fill: none; stroke: var(--r2); stroke-width: 2; transition: transform 0.3s; flex-shrink: 0; }
.fi input:checked ~ .fl { background: var(--r5); }
.fi input:checked ~ .fl svg { transform: rotate(180deg); }
.fa { max-height: 0; overflow: hidden; transition: max-height 0.35s; }
.fi input:checked ~ .fa { max-height: 280px; }
.fai { padding: 0 22px 18px; font-size: 14px; color: var(--mu); line-height: 1.8; background: var(--r5); }

/* ===== 页脚 ===== */
footer { background: #111827; color: rgba(255,255,255,0.6); padding: 52px 0 24px; }
.ftw { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.ft-brand { font-size: 20px; font-weight: 900; color: #fff; margin-bottom: 8px; }
.ft-desc { font-size: 13px; line-height: 1.7; max-width: 380px; margin-bottom: 24px; }
.ft-nav { display: flex; gap: 20px; margin-bottom: 28px; flex-wrap: wrap; }
.ft-nav a { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 14px; transition: color 0.15s; }
.ft-nav a:hover { color: #fff; }
.ft-bot { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 22px; }
.ft-sec { display: flex; align-items: flex-start; gap: 9px; font-size: 13px; margin-bottom: 12px; }
.ft-sec svg { width: 16px; height: 16px; fill: #4ade80; flex-shrink: 0; margin-top: 2px; }
.ft-copy { font-size: 12px; color: rgba(255,255,255,0.3); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .hero-r { display: none; }
  .f2g { grid-template-columns: 1fr; }
  .depth-grid { grid-template-columns: 1fr; gap: 28px; }
  .pg { grid-template-columns: repeat(2, 1fr); }
  .rg { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
  .pg, .rg { grid-template-columns: 1fr; }
  h2.hd { font-size: 24px; }
  .w { padding: 0 16px; }
}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* ===== 下载页专用 ===== */
.dl-top { background: var(--r2); color: #fff; padding: 72px 0 48px; }
.dl-top h1 { font-size: 40px; font-weight: 900; margin-bottom: 8px; letter-spacing: -1px; }
.dl-top p { font-size: 17px; opacity: 0.82; }
.dl-main-c { background: #fff; border-radius: 16px; padding: 36px; max-width: 700px; margin: -30px auto 0; position: relative; z-index: 5; box-shadow: 0 8px 40px rgba(0,0,0,0.12); }
.dl-main-c h2 { font-size: 19px; font-weight: 800; margin-bottom: 5px; }
.dl-main-c .dv { font-size: 13px; color: var(--mu); margin-bottom: 18px; }
.dl-main-c .dl-mb { background: var(--r2); color: #fff; border: none; border-radius: 10px; padding: 14px 36px; font-size: 17px; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; gap: 10px; transition: background 0.15s, transform 0.15s; }
.dl-main-c .dl-mb:hover { background: var(--r1); transform: translateY(-2px); }
.dl-main-c .ds { font-size: 13px; color: var(--mu); margin-top: 8px; }
.pl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 44px; }
.plc { border: 1px solid var(--bd); border-radius: 12px; padding: 22px 16px; text-align: center; }
.plc h3 { font-size: 15px; font-weight: 700; margin: 10px 0 4px; }
.plc .pv { font-size: 12px; color: var(--mu); margin-bottom: 4px; }
.plc .pr { font-size: 12px; color: var(--mu); margin-bottom: 14px; line-height: 1.5; }
.plc-btn { width: 100%; background: var(--r2); color: #fff; border: none; border-radius: 8px; padding: 10px 0; font-size: 13px; font-weight: 700; cursor: pointer; transition: background 0.15s; }
.plc-btn:hover { background: var(--r1); }
.step-r { display: flex; gap: 14px; margin-bottom: 18px; }
.snr { width: 28px; height: 28px; background: var(--r2); color: #fff; border-radius: 50%; font-weight: 800; font-size: 13px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.scr h4 { font-size: 14px; font-weight: 700; margin-bottom: 3px; }
.scr p { font-size: 13px; color: var(--mu); line-height: 1.6; }
.rt-tb { width: 100%; border-collapse: collapse; }
.rt-tb th { background: var(--r6); padding: 10px 14px; font-size: 13px; text-align: left; border-bottom: 2px solid var(--bd); }
.rt-tb td { padding: 10px 14px; font-size: 13px; color: var(--mu); border-bottom: 1px solid var(--bd); }
.clg { border-left: 3px solid var(--r3); padding-left: 16px; margin-bottom: 20px; }
.clg h4 { font-size: 14px; font-weight: 700; color: var(--r2); }
.clg .dt { font-size: 12px; color: var(--mu); margin-bottom: 5px; }
.clg ul { font-size: 13px; color: var(--mu); padding-left: 14px; list-style: disc; }
.clg ul li { margin-bottom: 3px; }
.sfb { background: var(--r6); border: 1px solid var(--r4); border-radius: 12px; padding: 20px 24px; display: flex; gap: 12px; align-items: flex-start; }
.sfb svg { width: 22px; height: 22px; fill: var(--r2); flex-shrink: 0; }
.sfb h4 { font-size: 14px; font-weight: 700; color: var(--r1); margin-bottom: 4px; }
.sfb p { font-size: 13px; color: var(--r1); opacity: 0.85; }

/* ===== 中文页 ===== */
.zh-h { background: var(--r2); color: #fff; padding: 72px 0 52px; }
.zh-h h1 { font-size: 38px; font-weight: 900; margin-bottom: 8px; letter-spacing: -1px; }
.zh-h p { font-size: 17px; opacity: 0.8; }
.art { max-width: 860px; margin: 0 auto; }
.art h2 { font-size: 24px; font-weight: 800; color: var(--r2); margin: 44px 0 14px; border-left: 4px solid var(--r2); padding-left: 14px; }
.art p { font-size: 16px; color: var(--mu); margin-bottom: 14px; line-height: 1.85; }
.art ul, .art ol { padding-left: 20px; margin-bottom: 14px; }
.art li { font-size: 15px; color: var(--mu); margin-bottom: 8px; line-height: 1.7; }
.art li strong { color: var(--tx); }
.cta-r { background: var(--r2); border-radius: 16px; padding: 52px 40px; text-align: center; color: #fff; margin-top: 56px; }
.cta-r h2 { font-size: 26px; font-weight: 900; margin-bottom: 10px; }
.cta-r p { font-size: 16px; opacity: 0.8; margin-bottom: 28px; }
.cta-r a { display: inline-block; background: #fff; color: var(--r2); font-size: 16px; font-weight: 700; padding: 13px 40px; border-radius: 100px; text-decoration: none; transition: transform 0.15s; }
.cta-r a:hover { transform: translateY(-2px); }