/* ==========================================================================
   非斯皮革工坊 (Fez Tannery) × 热敏纸材质 · 7:10 书籍封面视觉系统
   布局：7:10 书籍封面，L 形色块包住标题区，右齐西式杂志，印刷出血 3mm 感
   主标题占幅 55%，模块间隙 16pt (21.33px)，安全边 4.5%
   设计：印章朱文压在角落；材质按热敏纸；装饰只出现在左下
   禁止渐变与投影；圆角 18 / 2 / 12 / 6
   骨架：封面骨架：系列名 / 期号 / 主标题；关键词植入「Shadowrocket 小火箭」
   断行策略：年份前置；信息点数量 4；禁止口号堆砌
   颜色：晨雾 青紫 (#5E5A80 / #48446A)、砖色 品红 (#B34A48)、铅笔灰 (#3A3945)
   参考色：#B34A48 / #1A7440；主色相约 256°
   ========================================================================== */

:root {
  /* 材质：热敏纸 (Thermal Receipt / Ledger Paper) */
  --bg-thermal-paper: #EFEFF5;
  --bg-thermal-card: #F7F7FC;
  --bg-thermal-pure: #FFFFFF;
  --bg-thermal-tint: #E5E5ED;

  /* 工业色彩：晨雾 青紫 (色相 256°) */
  --mist-violet-deep: #48446A;
  --mist-violet-mid: #5E5A80;
  --mist-violet-light: #7E7A9F;
  --mist-violet-soft: #D9D8E6;

  /* 砖色 品红 (朱文印章与强调) */
  --brick-magenta: #B34A48;
  --brick-magenta-deep: #8E3533;
  --brick-magenta-soft: #F5E8E8;

  /* 铅笔灰 (文本与边框) */
  --pencil-black: #25242D;
  --pencil-dark: #3A3945;
  --pencil-gray: #626070;
  --pencil-light: #9B98A6;
  --pencil-rule: #CCCAD8;

  /* 参考绿色 (常春藤绿/连接成功) */
  --ivy-green: #1A7440;
  --ivy-green-soft: #E3F2E8;

  /* 几何与印刷参数 */
  --radius-fez: 18px 2px 12px 6px;
  --gap-16pt: 21.33px;
  --safe-margin: 4.5%;
  --bleed-3mm: 11.3px;

  /* 字体系统 */
  --font-serif-cover: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --font-sans-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono-code: "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-thermal-paper);
  color: var(--pencil-black);
}

body {
  font-family: var(--font-sans-body);
  line-height: 1.6;
  background-color: var(--bg-thermal-paper);
  color: var(--pencil-black);
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 印刷出血 3mm 感与裁切线容器 */
.bleed-container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding-left: var(--safe-margin);
  padding-right: var(--safe-margin);
  position: relative;
}

/* 印刷裁切线标尺辅助 (西式杂志感) */
.press-crop-mark-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono-code);
  font-size: 0.65rem;
  color: var(--pencil-light);
  padding: 6px 0;
  border-bottom: 1px dashed var(--pencil-rule);
  margin-bottom: var(--gap-16pt);
  letter-spacing: 0.08em;
}

.press-crop-mark-top .crop-bars {
  display: inline-flex;
  gap: 4px;
}
.press-crop-mark-top .crop-bar-color {
  width: 10px;
  height: 6px;
  display: inline-block;
}

/* 装饰只出现在左下 (朱文印章与非斯皮革工坊印标) */
.fez-decor-bottom-left {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 5;
  pointer-events: none;
}

/* 朱文印章：白底朱红字或朱红方框朱文篆刻 */
.seal-zhuwen {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border: 2px solid var(--brick-magenta);
  background-color: var(--bg-thermal-pure);
  color: var(--brick-magenta);
  padding: 4px 6px;
  font-family: var(--font-serif-cover);
  font-weight: 900;
  font-size: 0.72rem;
  line-height: 1.15;
  letter-spacing: 0.12em;
  border-radius: var(--radius-fez);
}

.seal-zhuwen span {
  display: block;
}

/* 1. 顶部导航 site-header (杂志页眉 + 非斯装订孔风格) */
.site-header {
  background-color: var(--bg-thermal-card);
  border-bottom: 2px solid var(--pencil-dark);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

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

.brand-fez-icon {
  width: 38px;
  height: 38px;
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-fez);
  border: 1.5px solid var(--pencil-black);
}

.brand-link {
  text-decoration: none;
  font-family: var(--font-serif-cover);
  font-weight: 900;
  font-size: 1.15rem;
  color: var(--pencil-black);
  letter-spacing: -0.02em;
}

.brand-link span {
  color: var(--brick-magenta);
  font-size: 0.88rem;
  font-family: var(--font-sans-body);
  font-weight: 700;
  margin-left: 4px;
}

.issue-tag-badge {
  font-family: var(--font-mono-code);
  font-size: 0.68rem;
  background-color: var(--mist-violet-soft);
  color: var(--mist-violet-deep);
  padding: 2px 6px;
  border: 1px solid var(--mist-violet-mid);
  border-radius: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--pencil-dark);
  padding: 6px 2px;
  position: relative;
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--brick-magenta);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brick-magenta);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--brick-magenta);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 8px 18px;
  text-decoration: none;
  border: 1.5px solid var(--brick-magenta-deep);
  border-radius: var(--radius-fez);
  transition: background-color 0.15s ease;
}

.btn-header-cta:hover {
  background-color: var(--brick-magenta-deep);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1.5px solid var(--pencil-dark);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-fez);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--pencil-black);
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

/* 2. Hero 区：7:10 书籍封面视觉，L 形色块包围标题，右齐西式杂志，主标题 55% */
.hero-book-section {
  padding-top: var(--gap-16pt);
  padding-bottom: calc(var(--gap-16pt) * 1.5);
}

.book-cover-wrapper {
  background-color: var(--bg-thermal-card);
  border: 2px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: calc(var(--gap-16pt) * 1.5);
  position: relative;
  overflow: hidden;
}

/* 印刷裁切出血线示意 */
.book-cover-wrapper::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  right: 4px;
  bottom: 4px;
  border: 1px dashed var(--pencil-rule);
  pointer-events: none;
  border-radius: var(--radius-fez);
}

/* 骨架 1：封面骨架：系列名 / 期号 / 主标题 */
.cover-meta-masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--pencil-dark);
  padding-bottom: 10px;
  margin-bottom: var(--gap-16pt);
  font-family: var(--font-mono-code);
  font-size: 0.78rem;
  color: var(--pencil-dark);
}

.series-title-flag {
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--mist-violet-deep);
  display: flex;
  align-items: center;
  gap: 8px;
}

.series-badge {
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  padding: 2px 6px;
  font-size: 0.68rem;
  border-radius: 2px;
}

.issue-number-text {
  font-weight: 700;
  color: var(--brick-magenta);
}

/* 双栏主视觉结构 */
.hero-layout-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: calc(var(--gap-16pt) * 1.5);
  align-items: start;
}

/* 左侧：L 形色块包住标题区，主标题占幅 55% */
.hero-left-content {
  position: relative;
}

/* L 形色块包住标题区 */
.l-shaped-headline-wrapper {
  position: relative;
  padding: 18px 20px 20px 24px;
  background-color: var(--bg-thermal-tint);
  border-top: 4px solid var(--mist-violet-deep);
  border-left: 6px solid var(--mist-violet-deep);
  border-radius: var(--radius-fez);
  margin-bottom: var(--gap-16pt);
}

/* 主标题占幅 55% */
.hero-main-h1 {
  font-family: var(--font-serif-cover);
  font-size: 2.1rem;
  line-height: 1.25;
  font-weight: 900;
  color: var(--pencil-black);
  max-width: 95%;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.hero-main-h1 .keyword-highlight {
  color: var(--brick-magenta);
  display: inline;
}

/* 封面副标与骨架规范说明 */
.cover-sub-strap {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--pencil-dark);
  line-height: 1.5;
}

/* 断行策略：年份前置导言 */
.pre-year-lead {
  font-size: 0.95rem;
  color: var(--pencil-dark);
  line-height: 1.65;
  margin-bottom: var(--gap-16pt);
  background-color: var(--bg-thermal-pure);
  padding: 12px 16px;
  border-left: 3px solid var(--brick-magenta);
  border-radius: var(--radius-fez);
}

.pre-year-badge {
  display: inline-block;
  background-color: var(--pencil-black);
  color: #FFFFFF;
  font-family: var(--font-mono-code);
  font-weight: 700;
  font-size: 0.78rem;
  padding: 2px 7px;
  margin-right: 8px;
  border-radius: 2px;
}

/* 4 条带对勾的卖点列表 / 4 个信息点规范 (固定 4 项) */
.four-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: var(--gap-16pt);
}

.four-info-card {
  background-color: var(--bg-thermal-pure);
  border: 1px solid var(--pencil-rule);
  padding: 10px 14px;
  border-radius: var(--radius-fez);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.four-info-num {
  font-family: var(--font-mono-code);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--mist-violet-deep);
  background-color: var(--mist-violet-soft);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  flex-shrink: 0;
}

.four-info-text {
  font-size: 0.84rem;
  color: var(--pencil-dark);
  line-height: 1.45;
}

.four-info-text strong {
  color: var(--pencil-black);
  display: block;
  font-size: 0.88rem;
  margin-bottom: 2px;
}

/* 按钮组 */
.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: var(--gap-16pt);
  flex-wrap: wrap;
}

.btn-primary-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--brick-magenta);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 800;
  font-size: 1rem;
  padding: 12px 26px;
  border: 2px solid var(--brick-magenta-deep);
  border-radius: var(--radius-fez);
  transition: background-color 0.15s ease;
}

.btn-primary-hero:hover {
  background-color: var(--brick-magenta-deep);
}

.btn-secondary-hero {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-thermal-pure);
  color: var(--pencil-black);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px 20px;
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  transition: background-color 0.15s ease;
}

.btn-secondary-hero:hover {
  background-color: var(--bg-thermal-tint);
}

/* 平台图标提示 */
.hero-platform-hint {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--pencil-gray);
  font-family: var(--font-mono-code);
}

.hero-platform-hint .platform-mini-icons {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-platform-hint svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

/* 右齐西式杂志栏目 (西式排版右对齐编辑语块) */
.west-mag-right-col {
  text-align: right;
  position: relative;
}

.west-mag-caption {
  font-family: var(--font-mono-code);
  font-size: 0.72rem;
  color: var(--pencil-gray);
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--pencil-rule);
  padding-bottom: 6px;
  margin-bottom: 12px;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* 客户端界面模拟 (mock-window)：纯 CSS/SVG，无投影，无渐变 */
.client-mock-window {
  background-color: var(--bg-thermal-pure);
  border: 2px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  overflow: hidden;
  margin-bottom: var(--gap-16pt);
  text-align: left;
}

.mock-window-titlebar {
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono-code);
  font-size: 0.75rem;
  font-weight: 700;
}

.mock-dots-group {
  display: flex;
  gap: 6px;
}

.mock-dot {
  width: 9px;
  height: 9px;
  border: 1px solid #FFFFFF;
  border-radius: 50%;
}
.mock-dot.d1 { background-color: var(--brick-magenta); }
.mock-dot.d2 { background-color: #E2B93B; }
.mock-dot.d3 { background-color: var(--ivy-green); }

.mock-window-body {
  padding: 16px;
}

/* 连接状态卡片 */
.mock-conn-card {
  background-color: var(--bg-thermal-card);
  border: 1px solid var(--pencil-rule);
  border-radius: var(--radius-fez);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.mock-conn-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mock-status-lamp {
  width: 14px;
  height: 14px;
  background-color: var(--ivy-green);
  border: 2px solid var(--pencil-black);
  border-radius: 50%;
}

.mock-conn-name {
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--pencil-black);
}

.mock-conn-mode {
  font-size: 0.72rem;
  font-family: var(--font-mono-code);
  color: var(--pencil-gray);
}

.mock-toggle-btn {
  background-color: var(--ivy-green);
  color: #FFFFFF;
  border: 1px solid var(--pencil-black);
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 2px;
}

/* 延迟曲线图 (SVG 纯色折线图/面积图，无渐变) */
.mock-chart-box {
  background-color: var(--bg-thermal-tint);
  border: 1px solid var(--pencil-rule);
  padding: 10px;
  border-radius: var(--radius-fez);
  margin-bottom: 14px;
}

.mock-chart-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  font-family: var(--font-mono-code);
  color: var(--pencil-dark);
  margin-bottom: 6px;
  font-weight: 700;
}

.mock-chart-svg {
  width: 100%;
  height: 80px;
  display: block;
}

/* 节点列表条目 */
.mock-nodes-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.mock-node-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background-color: var(--bg-thermal-card);
  border: 1px solid var(--pencil-rule);
  border-radius: var(--radius-fez);
  font-size: 0.8rem;
}

.mock-node-item.active {
  border-color: var(--brick-magenta);
  background-color: var(--brick-magenta-soft);
}

.mock-node-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.mock-node-ping {
  font-family: var(--font-mono-code);
  font-weight: 700;
  color: var(--ivy-green);
  font-size: 0.78rem;
}

/* 两个浮动数据卡片（纯平设计） */
.mock-floating-pills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.floating-pill {
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  padding: 10px 12px;
  border: 1.5px solid var(--pencil-black);
  border-radius: var(--radius-fez);
  text-align: center;
}

.pill-big-val {
  font-family: var(--font-mono-code);
  font-size: 1.25rem;
  font-weight: 900;
  color: #FFFFFF;
  line-height: 1;
  margin-bottom: 4px;
}

.pill-sub-txt {
  font-size: 0.72rem;
  color: var(--mist-violet-soft);
}

/* 展示图片外框 (1.webp, 2.webp, 3.webp, 4.webp) */
.fez-showcase-img {
  width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  background-color: var(--bg-thermal-pure);
  margin-top: 14px;
}

/* 3. 平台入口带 platform-strip (5 张平台卡片 Win/macOS/iOS/Android/Linux) */
.platform-strip-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.platform-grid-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.platform-card-box {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 14px 12px;
  text-decoration: none;
  color: var(--pencil-black);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  position: relative;
}

.platform-card-box:hover {
  background-color: var(--bg-thermal-pure);
  border-color: var(--brick-magenta);
}

.platform-card-icon {
  width: 32px;
  height: 32px;
  color: var(--mist-violet-deep);
  margin-bottom: 8px;
}

.platform-card-icon svg {
  width: 100%;
  height: 100%;
}

.platform-card-name {
  font-family: var(--font-serif-cover);
  font-weight: 900;
  font-size: 1rem;
  color: var(--pencil-black);
  margin-bottom: 2px;
}

.platform-card-req {
  font-size: 0.72rem;
  color: var(--pencil-gray);
  margin-bottom: 6px;
}

.platform-card-ver {
  font-family: var(--font-mono-code);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--brick-magenta);
  background-color: var(--brick-magenta-soft);
  padding: 2px 6px;
  border-radius: 2px;
  align-self: flex-start;
}

/* 4. 数据速览 stats-band (4 格大数字：5.8万用户 / 120万下载 / 300+线路 / 2450+评价) */
.stats-band-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.stats-band-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-16pt);
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  border: 2px solid var(--pencil-black);
  border-radius: var(--radius-fez);
  padding: calc(var(--gap-16pt) * 1.2);
}

.stat-cell-item {
  border-right: 1px dashed var(--mist-violet-light);
  padding-right: 14px;
}
.stat-cell-item:last-child {
  border-right: none;
  padding-right: 0;
}

.stat-big-number {
  font-family: var(--font-mono-code);
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.1;
  color: #FFFFFF;
  margin-bottom: 4px;
}

.stat-cell-label {
  font-size: 0.86rem;
  color: var(--mist-violet-soft);
  font-weight: 600;
}

/* 模块通用标题区 */
.section-meta-head {
  text-align: left;
  margin-bottom: var(--gap-16pt);
  border-bottom: 2px solid var(--pencil-dark);
  padding-bottom: 8px;
}

.section-tag-kicker {
  font-family: var(--font-mono-code);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--brick-magenta);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}

.section-headline-h2 {
  font-family: var(--font-serif-cover);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--pencil-black);
  line-height: 1.3;
}

.section-summary-lead {
  font-size: 0.9rem;
  color: var(--pencil-dark);
  margin-top: 4px;
}

/* 5. 六大能力 feature-grid (3 列卡片网格，每卡：SVG 图标 + 标题 + 一句话说明，回答解决什么问题) */
.features-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.features-grid-3x2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-16pt);
}

.feature-box-card {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
}

.feature-box-icon {
  width: 40px;
  height: 40px;
  color: var(--mist-violet-deep);
  margin-bottom: 12px;
}

.feature-box-icon svg {
  width: 100%;
  height: 100%;
}

.feature-box-title {
  font-family: var(--font-serif-cover);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--pencil-black);
  margin-bottom: 8px;
}

.feature-box-desc {
  font-size: 0.88rem;
  color: var(--pencil-dark);
  line-height: 1.6;
}

/* 6. 工作原理 tech-grid (双栏技术 01/02 + 延迟降低 45% 钩子) */
.tech-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.tech-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-16pt);
}

.tech-pane-card {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 20px;
}

.tech-pane-head {
  border-bottom: 1.5px solid var(--pencil-dark);
  padding-bottom: 10px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tech-pane-title {
  font-family: var(--font-serif-cover);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--pencil-black);
}

.tech-step-item {
  margin-bottom: 16px;
}
.tech-step-item:last-child {
  margin-bottom: 0;
}

.tech-step-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.tech-step-num {
  font-family: var(--font-mono-code);
  font-size: 0.82rem;
  font-weight: 900;
  color: #FFFFFF;
  background-color: var(--mist-violet-deep);
  padding: 1px 6px;
  border-radius: 2px;
}

.tech-step-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--pencil-black);
}

.tech-step-desc {
  font-size: 0.86rem;
  color: var(--pencil-dark);
  line-height: 1.55;
  padding-left: 28px;
}

.tech-hook-callout {
  background-color: var(--brick-magenta-soft);
  border: 1px dashed var(--brick-magenta);
  padding: 12px 16px;
  border-radius: var(--radius-fez);
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.tech-hook-val {
  font-family: var(--font-mono-code);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--brick-magenta);
}

.tech-hook-text {
  font-size: 0.84rem;
  color: var(--brick-magenta-deep);
  line-height: 1.4;
}

/* 7. 用户评价 review-grid (4.9/5 + 4 张评价卡彩色首字母头像 a1~a4 + 核验时间戳) */
.reviews-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.rating-top-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 12px 18px;
  margin-bottom: var(--gap-16pt);
}

.rating-score-num {
  font-family: var(--font-mono-code);
  font-size: 1.7rem;
  font-weight: 900;
  color: var(--brick-magenta);
}

.stars-svg-wrap {
  display: flex;
  gap: 3px;
  color: #E2B93B;
}

.rating-note-txt {
  font-size: 0.84rem;
  color: var(--pencil-gray);
  margin-left: auto;
  font-family: var(--font-mono-code);
}

.reviews-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.review-card-item {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.review-author-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.avatar-initial {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-fez);
  border: 1.5px solid var(--pencil-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono-code);
  font-weight: 900;
  font-size: 0.95rem;
  color: #FFFFFF;
}
.avatar-initial.a1 { background-color: var(--mist-violet-deep); }
.avatar-initial.a2 { background-color: var(--brick-magenta); }
.avatar-initial.a3 { background-color: #385E48; }
.avatar-initial.a4 { background-color: #8C6239; }

.review-meta-text {
  line-height: 1.25;
}

.review-user-name {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--pencil-black);
}

.review-user-tag {
  font-size: 0.72rem;
  color: var(--pencil-gray);
}

.review-quote-p {
  font-size: 0.84rem;
  color: var(--pencil-dark);
  line-height: 1.5;
  margin-bottom: 12px;
  font-style: italic;
}

.review-stamp-verified {
  font-family: var(--font-mono-code);
  font-size: 0.68rem;
  color: var(--ivy-green);
  border-top: 1px dashed var(--pencil-rule);
  padding-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 8. 认证背书 trust-grid (4 张信任卡：ISO 27001 / 双商店上架 / 年度审计 / SSL 支付) */
.trust-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.trust-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.trust-card-box {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  padding: 16px;
  text-align: center;
}

.trust-icon-svg {
  width: 36px;
  height: 36px;
  color: var(--mist-violet-deep);
  margin: 0 auto 10px;
}

.trust-icon-svg svg {
  width: 100%;
  height: 100%;
}

.trust-card-h4 {
  font-family: var(--font-serif-cover);
  font-size: 0.96rem;
  font-weight: 800;
  color: var(--pencil-black);
  margin-bottom: 4px;
}

.trust-card-desc {
  font-size: 0.76rem;
  color: var(--pencil-gray);
  line-height: 1.45;
}

/* 9. 对比表 cmp-table (4 列 × 8 行表格，自家 .hl 高亮 + 免责声明) */
.compare-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.table-outer-frame {
  background-color: var(--bg-thermal-card);
  border: 2px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  overflow-x: auto;
  margin-bottom: 10px;
}

.cmp-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
  text-align: left;
}

.cmp-data-table th,
.cmp-data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--pencil-rule);
  border-right: 1px solid var(--pencil-rule);
}

.cmp-data-table th:last-child,
.cmp-data-table td:last-child {
  border-right: none;
}

.cmp-data-table tr:last-child td {
  border-bottom: none;
}

.cmp-data-table thead th {
  background-color: var(--mist-violet-deep);
  color: #FFFFFF;
  font-family: var(--font-serif-cover);
  font-weight: 800;
  font-size: 0.92rem;
}

.cmp-data-table th.hl,
.cmp-data-table td.hl {
  background-color: var(--brick-magenta-soft);
  font-weight: 700;
  color: var(--brick-magenta-deep);
  border-left: 2px solid var(--brick-magenta);
  border-right: 2px solid var(--brick-magenta);
}

.cmp-disclaimer-foot {
  font-size: 0.75rem;
  color: var(--pencil-gray);
  font-family: var(--font-mono-code);
  text-align: right;
  padding: 4px 2px;
}

/* 10. FAQ faq-list (手风琴交互：点击展开同时只保留一个展开) */
.faq-section {
  padding-top: var(--gap-16pt);
  padding-bottom: var(--gap-16pt);
}

.faq-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-accordion-item {
  background-color: var(--bg-thermal-card);
  border: 1.5px solid var(--pencil-dark);
  border-radius: var(--radius-fez);
  overflow: hidden;
}

.faq-question-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 16px 20px;
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--pencil-black);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-sans-body);
}

.faq-question-btn:hover {
  background-color: var(--bg-thermal-pure);
}

.faq-arrow-icon {
  width: 18px;
  height: 18px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
  color: var(--brick-magenta);
}

.faq-accordion-item.open .faq-arrow-icon {
  transform: rotate(180deg);
}

.faq-answer-panel {
  display: none;
  padding: 0 20px 16px 20px;
  font-size: 0.88rem;
  color: var(--pencil-dark);
  line-height: 1.65;
  border-top: 1px dashed var(--pencil-rule);
  padding-top: 12px;
}

.faq-accordion-item.open .faq-answer-panel {
  display: block;
}

/* 11. CTA 横幅 cta-band (深色背景 + 大标题 + 双按钮) */
.cta-band-section {
  padding-top: var(--gap-16pt);
  padding-bottom: calc(var(--gap-16pt) * 1.5);
}

.cta-box-wrapper {
  background-color: var(--mist-violet-deep);
  border: 2px solid var(--pencil-black);
  border-radius: var(--radius-fez);
  padding: calc(var(--gap-16pt) * 1.5);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-text-side {
  max-width: 65%;
}

.cta-big-h3 {
  font-family: var(--font-serif-cover);
  font-size: 1.85rem;
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 8px;
  color: #FFFFFF;
}

.cta-sub-p {
  font-size: 0.92rem;
  color: var(--mist-violet-soft);
  line-height: 1.5;
}

.cta-btns-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

.btn-cta-main {
  background-color: var(--brick-magenta);
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.98rem;
  padding: 12px 28px;
  border: 2px solid var(--brick-magenta-deep);
  border-radius: var(--radius-fez);
  text-align: center;
  transition: background-color 0.15s ease;
}

.btn-cta-main:hover {
  background-color: var(--brick-magenta-deep);
}

.btn-cta-sub {
  background-color: transparent;
  color: #FFFFFF;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 10px 24px;
  border: 1.5px solid var(--mist-violet-light);
  border-radius: var(--radius-fez);
  text-align: center;
}

.btn-cta-sub:hover {
  background-color: var(--mist-violet-mid);
}

/* 12. 页脚 site-footer (4 列链接 + SEO 关键词段落 + 免责声明 + 版权行) */
.site-footer {
  background-color: var(--bg-thermal-card);
  border-top: 2px solid var(--pencil-dark);
  padding-top: calc(var(--gap-16pt) * 1.5);
  padding-bottom: var(--gap-16pt);
}

.footer-nav-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: var(--gap-16pt);
}

.footer-col-h4 {
  font-family: var(--font-serif-cover);
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--pencil-black);
  margin-bottom: 12px;
  border-bottom: 1.5px solid var(--pencil-dark);
  padding-bottom: 6px;
}

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link-list a {
  text-decoration: none;
  font-size: 0.84rem;
  color: var(--pencil-dark);
  transition: color 0.15s ease;
}

.footer-link-list a:hover {
  color: var(--brick-magenta);
}

.footer-seo-card {
  background-color: var(--bg-thermal-tint);
  border: 1px dashed var(--pencil-rule);
  padding: 14px 18px;
  border-radius: var(--radius-fez);
  margin-bottom: var(--gap-16pt);
}

.footer-seo-h5 {
  font-family: var(--font-mono-code);
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--mist-violet-deep);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}

.footer-seo-p {
  font-size: 0.8rem;
  color: var(--pencil-gray);
  line-height: 1.6;
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--pencil-rule);
  padding-top: 12px;
  font-size: 0.76rem;
  color: var(--pencil-gray);
  font-family: var(--font-mono-code);
}

/* 响应式断点适配 */
@media (max-width: 992px) {
  .hero-layout-grid {
    grid-template-columns: 1fr;
  }
  .west-mag-right-col {
    text-align: left;
  }
  .platform-grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  .features-grid-3x2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-box-wrapper {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-text-side {
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background-color: var(--bg-thermal-card);
    border-bottom: 2px solid var(--pencil-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px var(--safe-margin);
    gap: 12px;
  }
  .main-nav.open {
    display: flex;
  }
  .stats-band-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-cell-item {
    border-right: none;
  }
  .platform-grid-5 {
    grid-template-columns: 1fr;
  }
  .features-grid-3x2 {
    grid-template-columns: 1fr;
  }
  .tech-grid-2col {
    grid-template-columns: 1fr;
  }
  .reviews-grid-4 {
    grid-template-columns: 1fr;
  }
  .trust-grid-4 {
    grid-template-columns: 1fr;
  }
  .footer-nav-grid-4 {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .four-info-grid {
    grid-template-columns: 1fr;
  }
  .hero-main-h1 {
    font-size: 1.65rem;
    max-width: 100%;
  }
}