/* ============================================
   ai-solo.xyz — 主样式表
   风格：极简克制 + 内容优先 + 白底
   对标：vibeshot.club（白底版）
   ============================================ */

/* ===== CSS Variables ===== */
:root {
  --bg: #F8F8F8;
  --text-primary: #222222;
  --text-secondary: #555555;
  --text-tertiary: #A7A7A7;
  --accent: #222222;
  --card-bg: #FFFFFF;
  --nav-height: 71px;
  --max-width: 1200px;
  --radius-card: 8px;
  --radius-btn: 8px;
  --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --border-light: #EDEDED;

  /* 字号 */
  --text-sm: 11px;
  --text-base: 14px;
  --text-lg: 18px;
  --text-xl: 22px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --gutter: 20px;
  --pad-inner: 52px;
}

/* ===== Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 2.0;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: var(--bg);
  border-bottom: none;
}

.nav.scrolled {
  background: var(--bg);
}



.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 38px;
}

.nav-logo {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 1px;
  color: var(--text-primary);
  margin-right: auto;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-link {
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--text-primary);
  transition: opacity var(--transition);
}

.nav-link:hover {
  opacity: 0.6;
}

/* 汉堡菜单按钮 — 桌面隐藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 20px;
  border-radius: var(--radius-btn);
  background: var(--text-primary);
  color: #fff;
  font-size: var(--text-base);
  font-weight: 500;
  transition: opacity var(--transition);
  border: none;
}

.nav-cta:hover {
  opacity: 0.85;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px var(--pad-inner);
  position: relative;
  background: var(--bg);
  overflow: hidden;
}

/* Hero背景插画 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('assets/hero-bg.webp') center/cover no-repeat;
  opacity: 0.22;
  pointer-events: none;
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero-title {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: clamp(60px, 10vw, 104px);
  line-height: 1.0;
  letter-spacing: -1.5px;
  color: #111;
}

.hero-title-line2 {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: clamp(44px, 7.5vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.5px;
  color: #333;
  margin-top: 14px;
  max-width: 86%;
  margin-left: auto;
  margin-right: auto;
}




.hero-subtitle {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: clamp(24px, 3.5vw, 36px);
  color: #555;
  margin-top: 36px;
  letter-spacing: 0;
  max-width: 580px;
  line-height: 1.2;
}

.hero-subtitle-line2 {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: clamp(20px, 3vw, 30px);
  color: #777;
  margin-top: 14px;
  letter-spacing: 0;
  max-width: 460px;
  line-height: 1.2;
}

.hero-desc {
  font-size: var(--text-base);
  color: var(--text-tertiary);
  margin-top: 20px;
  letter-spacing: 0;
}

.hero-scroll-hint { position: absolute; bottom: 40px; font-size: var(--text-sm); color: var(--text-tertiary); animation: bounce 2s infinite; }

/* ===== Bounce ===== */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

/* ===== Section ===== */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px var(--pad-inner);
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: var(--text-xl);
  color: var(--text-primary);
  letter-spacing: 0;
}

.section-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Scene Cards Grid ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter);
}

.scene-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 24px;
  position: relative;
  overflow: hidden;
}



.card-rank {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 48px;
  color: rgba(0, 0, 0, 0.04);
  position: absolute;
  top: 12px;
  right: 20px;
  line-height: 1;
  pointer-events: none;
}

.card-bar {
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  margin-bottom: 20px;
  transition: width 1s ease;
}

/* about specific: keep accent for timeline */

.card-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.card-stat {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}

.stat-value {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 28px;
  color: var(--text-primary);
}

.stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
}

.card-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-products {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-tag {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  border: 1px solid var(--border-light);
  transition: border-color var(--transition);
}

.product-tag:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

/* ===== Fade-in Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Channels ===== */
.section-channels {
  padding-top: 80px;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.channel-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px;
  position: relative;
  display: flex;
  flex-direction: column;
}



.channel-icon {
  font-size: 28px;
  margin-bottom: 16px;
}

.channel-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.channel-desc {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.channel-arrow {
  margin-top: 16px;
  font-size: 18px;
  color: var(--text-tertiary);
  transition: transform var(--transition), color var(--transition);
}

.channel-card:hover .channel-arrow {
  transform: translateX(4px);
  color: var(--text-primary);
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 64px var(--pad-inner) 32px;
  background: var(--bg);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.footer-brand-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 2px;
  color: var(--text-primary);
}

.footer-logo {
  display: flex;
  align-items: center;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.7;
}

.footer-nav {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-wechat {
  position: relative;
}

.qrcode-placeholder {
  margin-top: 8px;
  width: 100px;
  height: 100px;
  background: var(--bg);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-tertiary);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.footer-bottom {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: 12px;
  color: var(--text-tertiary);
}

.footer-partner-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-partner-link:hover {
  color: var(--text-primary);
}

/* ===== Channel Page (通用) ===== */
.page {
  padding-top: var(--nav-height);
}

.page-hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px var(--pad-inner) 64px;
  text-align: center;
}

.page-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.page-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(36px, 6vw, 64px);
  color: var(--text-primary);
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
}

.page-lead {
  font-size: var(--text-base);
  color: var(--text-secondary);
  font-weight: 300;
  margin-bottom: 24px;
  line-height: 1.5;
}

.page-sub {
  font-size: var(--text-base);
  color: var(--text-tertiary);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

.page-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--pad-inner) 120px;
}

/* Nav active state */
.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}

/* ===== Case List ===== */
.case-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-card {
  display: flex;
  gap: 24px;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 24px;
}



.case-number {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 24px;
  color: rgba(0, 0, 0, 0.08);
  min-width: 40px;
  line-height: 1.4;
}

.case-content {
  flex: 1;
}

.case-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.case-meta {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 8px;
}

.case-brief {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Timeline (关于我) ===== */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0, 0, 0, 0.08);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-dot {
  position: absolute;
  left: -28px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--text-primary);
}

.timeline-content {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.timeline-period {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.timeline-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-primary);
  margin: 8px 0;
}

.timeline-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== About Page ===== */
.about-hero {
  padding: 80px var(--pad-inner) 64px;
  background: var(--card-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

/* 格言 — 一行右对齐，小字号但醒目 */
.about-motto {
  max-width: var(--max-width);
  margin: 0 auto 40px;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  letter-spacing: 0.08em;
  text-align: right;
}

.motto-break {
  display: inline;
}

.about-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--card-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.about-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 56px);
  color: var(--text-primary);
  letter-spacing: -1px;
  line-height: 1.15;
}

.about-name-en {
  font-weight: 300;
  color: var(--text-tertiary);
  font-size: 0.6em;
  letter-spacing: 2px;
}

.about-slogan {
  font-size: 15px;
  color: var(--accent);
  font-weight: 600;
  margin-top: 8px;
  letter-spacing: 1px;
}

/* 六宫格数字卡片 */
.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat-card {
  background: var(--bg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 12px;
  padding: 20px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.stat-num {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 36px;
  color: var(--accent);
  line-height: 1;
}

.stat-unit {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-left: 1px;
}

.stat-card .stat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 2px;
}

.stat-sub {
  font-size: 11px;
  color: var(--text-tertiary);
}

/* About Section */
.about-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px var(--pad-inner);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.about-section:last-of-type {
  border-bottom: none;
}

.about-section-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* ===== 当前事业 卡片 ===== */
.about-now-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.now-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition);
}

.now-card:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.now-card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.now-card-icon img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.now-card h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  margin: 0;
}

.now-card p {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

.now-card-link {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
  margin-top: 4px;
}

.now-card-link:hover {
  opacity: 0.7;
}

/* ===== 六边形雷达图 ===== */
.radar-wrap {
  display: flex;
  justify-content: center;
  margin: 28px 0 0;
}

.radar-svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.radar-label {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 13px;
  fill: var(--text-secondary);
}

/* ===== 能力时间线 ===== */
.skill-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.skill-line {
  padding: 18px 24px;
  background: var(--card-bg);
  border-radius: 12px;
  border-left: 3px solid var(--accent);
}

.skill-line p {
  font-family: var(--font-title);
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
  margin: 0;
  font-weight: 500;
}

.skill-arrow {
  color: var(--accent);
  font-weight: 700;
  margin: 0 6px;
}

.about-section-desc {
  font-size: 15px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 28px;
}

.about-sub-title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 16px;
}

/* ===== 硬件卡片网格 ===== */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.hardware-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  text-align: center;
  transition: box-shadow var(--transition);
}

.hardware-card:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.hardware-img-wrap {
  width: 100%;
  height: 180px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  overflow: hidden;
}

.hardware-img-wrap img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.hardware-card span {
  display: block;
  padding: 14px 12px;
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
}

/* ===== 经验表格 ===== */
.exp-table-wrap {
  margin-top: 16px;
}

.exp-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.exp-table thead th,
.exp-table tbody td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.exp-domain-header {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 14px !important;
  color: var(--text-primary) !important;
  background: rgba(0, 0, 0, 0.025);
  border-radius: 8px 8px 0 0;
  padding: 14px 16px !important;
  border-bottom: 2px solid rgba(0, 0, 0, 0.08) !important;
}

.exp-bullet {
  width: 36px;
  min-width: 36px;
  font-family: var(--font-title);
  font-weight: 700;
  color: var(--text-secondary) !important;
  font-size: 13px !important;
  text-align: center;
  opacity: 0.5;
}

.exp-table tbody tr:last-child td {
  border-bottom: none;
}

/* Career List */
.career-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.career-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.career-time {
  min-width: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 16px;
}

.career-card {
  flex: 1;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 16px 20px;
  border-left: 3px solid transparent;
  transition: border-color var(--transition);
}

.career-item:hover .career-card {
  border-left-color: var(--accent);
}

.career-highlight .career-company {
  font-weight: 700;
}

.career-company {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.career-scope {
  font-size: 13px;
  color: var(--text-tertiary);
}

/* ===== 产品春天 专属样式 ===== */
.spring-reasons {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.spring-reason {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
}

.reason-num {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 28px;
  color: var(--accent);
  opacity: 0.3;
  min-width: 40px;
  line-height: 1;
}

.spring-reason h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.spring-reason p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.pm-tools {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.pm-tool {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
}

.pm-tool-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.pm-tool-icon {
  font-size: 20px;
}

.pm-tool-header h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  color: var(--text-primary);
  flex: 1;
}

.pm-tool-rate {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 18px;
  color: var(--accent);
}

.pm-tool p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.pm-tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pm-tool-tags span {
  font-size: 11px;
  color: var(--accent);
  background: rgba(0, 0, 0, 0.06);
  padding: 3px 10px;
  border-radius: 999px;
}

/* ===== 一人成军 专属样式 ===== */
.army-logic {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.army-step {
  display: flex;
  gap: 20px;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
}

.army-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.army-step-body h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.army-step-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Scene Bars */
.scene-bars {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scene-bar-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.scene-bar-label {
  min-width: 120px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-secondary);
}

.scene-bar-label span:last-child {
  font-weight: 700;
  color: var(--accent);
}

.scene-bar-track {
  flex: 1;
  height: 6px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 3px;
  overflow: hidden;
}

.scene-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 1.2s ease;
}

.scene-bars-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-tertiary);
  text-align: center;
}

/* ===== 一点心得 专属样式 ===== */
.lessons-domains {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.lesson-domain {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
}

.domain-icon {
  font-size: 26px;
  line-height: 1;
  margin-top: 2px;
}

.lesson-domain h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.lesson-domain p {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

.principles-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.principle {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.principle-icon {
  font-size: 20px;
  margin-top: 2px;
}

.principle h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.principle p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Placeholder */
.placeholder-block {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  border: 1px dashed rgba(0, 0, 0, 0.1);
}

.placeholder-block p {
  font-size: 14px;
  color: var(--text-tertiary);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .channels-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .channels-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav-links {
    gap: 20px;
  }

  .about-hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-now-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .hardware-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pm-tools {
    grid-template-columns: 1fr;
  }

  .lessons-domains {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .cards-grid {
    grid-template-columns: 1fr;
  }

  .channels-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 260px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    padding: 88px 32px 32px;
    gap: 24px;
    transition: right 0.3s ease;
    box-shadow: -4px 0 24px rgba(0,0,0,0.08);
    z-index: 1000;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-link {
    font-size: 17px;
    font-weight: 500;
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 80px 16px;
  }

  .hero-title {
    font-size: clamp(36px, 10vw, 52px);
    line-height: 1.0;
    color: #111;
  }

  .hero-title-line2 {
    font-size: clamp(28px, 8vw, 40px);
    line-height: 1.05;
    color: #333;
    margin-top: 10px;
  }

  .hero-subtitle {
    font-size: 18px;
    max-width: 100%;
    color: #555;
    margin-top: 24px;
  }

  .hero-subtitle-line2 {
    font-size: 16px;
    max-width: 90%;
    color: #777;
    margin-top: 10px;
  }

  .about-hero-inner {
    grid-template-columns: 1fr;
  }

  .about-motto {
    text-align: right;
    font-size: 13px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-now-cards {
    grid-template-columns: 1fr;
  }

  .radar-svg {
    max-width: 320px;
  }

  .hardware-grid {
    grid-template-columns: 1fr;
  }

  .career-item {
    flex-direction: column;
    gap: 4px;
  }

  .career-time {
    padding-top: 0;
  }

  .exp-bullet {
    width: 28px;
    min-width: 28px;
  }

  .pm-tools {
    grid-template-columns: 1fr;
  }

  .lessons-domains {
    grid-template-columns: 1fr;
  }

  .spring-reason {
    flex-direction: column;
    gap: 12px;
  }

  .scene-bar-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .scene-bar-label {
    min-width: auto;
    width: 100%;
  }

  .army-step {
    flex-direction: column;
    gap: 12px;
  }
}

/* ===== 新增：案例卡片 / 复盘卡片 ===== */

/* Hero 使命句 */
.hero-mission {
  font-size: var(--text-lg);
  color: var(--text-primary);
  font-weight: 400;
  max-width: 560px;
  margin: 28px auto 0;
  text-align: center;
  line-height: 1.8;
}

/* 案例卡片 */
.card-case {
  background: var(--card-bg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
}

.card-case .case-title-big {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 20px;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.card-case .case-bg {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-case .case-section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.card-case .case-points {
  list-style: none;
  padding: 0;
  margin: 0 0 16px 0;
}

.card-case .case-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 4px;
}

.card-case .case-points li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-weight: 700;
}

.card-case .case-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 16px;
}

.card-case .case-lesson {
  background: rgba(0, 0, 0, 0.04);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.6;
}

.card-case .case-cta {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}

/* 段位表 */
.duanwei-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-bottom: 16px;
}

.duanwei-table th {
  background: rgba(0, 0, 0, 0.05);
  color: var(--accent);
  font-weight: 600;
  padding: 10px 12px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.5px;
}

.duanwei-table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  color: var(--text-secondary);
  line-height: 1.5;
}

.duanwei-table tr:first-child td {
  padding-top: 12px;
}

.duanwei-visual {
  margin: 16px 0;
}

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 复盘卡片 */
.card-review {
  background: var(--card-bg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
}

.card-review .review-domain-title {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.card-review .review-era-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 6px;
  margin-top: 14px;
}

.card-review .review-era-label:first-of-type {
  margin-top: 0;
}

.card-review p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 4px;
}

.card-review .case-points {
  list-style: none;
  padding: 0;
  margin: 0 0 8px 0;
}

.card-review .case-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 3px;
}

.card-review .case-points li::before {
  content: '·';
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-weight: 700;
}

.card-review .case-lesson {
  background: rgba(0, 0, 0, 0.04);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  margin-top: 12px;
}

/* 响应式：案例卡片双列变单列 */
@media (max-width: 768px) {
  .card-case .case-columns {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .card-case,
  .card-review {
    padding: 20px;
  }

  .hero-mission {
  font-size: var(--text-lg);
  color: var(--text-primary);
  font-weight: 400;
  max-width: 560px;
  margin: 28px auto 0;
  text-align: center;
  line-height: 1.8;
}
}