/* ═══════════════════════════════════════════════════
   LREN — 手账笔记风格  Notebook Style
═══════════════════════════════════════════════════ */

:root {
  /* 纸张 & 背景 */
  --paper:        #faf6ee;
  --paper-dark:   #f2ead8;
  --paper-line:   #d4c9a8;
  --paper-margin: #e8d5b7;

  /* 文字 */
  --ink:          #2c2416;
  --ink-light:    #6b5e42;
  --ink-faint:    #9e8e6c;

  /* 蜡笔强调色 */
  --pen-red:      #e05c5c;
  --pen-blue:     #5b8fd4;
  --pen-yellow:   #e8c84a;
  --pen-green:    #6ab87a;
  --pen-pink:     #d48fb5;
  --pen-orange:   #e89060;

  /* 装饰 */
  --tape:         rgba(255, 248, 220, 0.75);
  --shadow:       0 2px 12px rgba(120, 100, 60, 0.12);
  --shadow-hover: 0 6px 24px rgba(120, 100, 60, 0.18);
  --radius:       12px;
  --radius-sm:    8px;

  font-family: "LXGW WenKai", "霞鹜文楷", "Noto Serif SC", "STSong", serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  /* 米黄方格笔记本背景 */
  background-color: var(--paper-dark);
  background-image:
    repeating-linear-gradient(
      transparent,
      transparent 31px,
      var(--paper-line) 31px,
      var(--paper-line) 32px
    ),
    linear-gradient(
      90deg,
      var(--paper-margin) 0,
      var(--paper-margin) 2px,
      transparent 2px
    );
  background-attachment: fixed;
}

/* ─── 导航栏 ─────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 88px), 1200px);
  margin: 16px auto 0;
  padding: 12px 20px;
  background: rgba(250, 246, 238, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.site-logo {
  font-family: 'Ma Shan Zheng', 'STSong', serif;
  color: var(--pen-red);
  font-size: 22px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.04em;
  text-shadow: 1px 1px 0 rgba(224, 92, 92, 0.2);
}

.site-nav {
  display: flex;
  gap: 6px;
  align-items: center;
}

.site-nav__item { position: relative; }

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: 20px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  box-shadow: 2px 2px 0 var(--paper-dark);
  transition: all 0.2s ease;
}

.site-nav a:hover {
  background: var(--pen-yellow);
  border-color: var(--pen-yellow);
  color: var(--ink);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--paper-dark);
}

.site-subnav {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  display: grid;
  gap: 6px;
  min-width: 140px;
  padding: 12px;
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.site-nav__item:hover .site-subnav {
  opacity: 1;
  pointer-events: auto;
}

.site-subnav a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 5px 12px;
  font-size: 13px;
  box-shadow: none;
  border-radius: 14px;
  text-align: center;
}

.site-subnav a:nth-child(1) { background: #fff3e0; border-color: var(--pen-orange); }
.site-subnav a:nth-child(2) { background: #e8f5e9; border-color: var(--pen-green); }
.site-subnav a:nth-child(3) { background: #e3f2fd; border-color: var(--pen-blue); }
.site-subnav a:nth-child(4) { background: #fce4ec; border-color: var(--pen-pink); }

.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 18px;
  border-radius: 20px;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  background: var(--pen-red);
  border: 1.5px solid rgba(0,0,0,0.1);
  box-shadow: 3px 3px 0 rgba(180, 80, 80, 0.35);
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.site-header__cta:hover {
  background: #c94c4c;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(180, 80, 80, 0.4);
  color: #fff;
}

/* ─── Hero ─────────────────────────────── */
.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: calc(100vh - 140px);
  padding: 40px;
  gap: 60px;
  flex-wrap: wrap;
}

.waves, .hero__grid, .hero__noise {
  display: none;
}

.hero__content {
  flex: 1;
  min-width: 300px;
  max-width: 600px;
  animation: fadeSlideIn 0.8s ease both;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  color: var(--ink-light);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.eyebrow__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pen-green);
  animation: dotPulse 2s ease-in-out infinite;
}

h1 {
  margin: 0 0 24px;
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.headline-line { display: block; }
.headline-line--two { color: var(--pen-red); }

.scramble {
  display: inline-block;
  min-width: 2em;
  font-variant-numeric: tabular-nums;
  color: var(--pen-blue);
  font-family: 'Ma Shan Zheng', serif;
  font-size: 1em;
}

.lead {
  margin: 0 0 36px;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--ink-light);
}

.lead__mark {
  display: inline;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--pen-yellow);
  color: var(--ink);
  font-weight: 700;
}

/* 指标卡片 */
.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 520px;
  margin-top: 24px;
}

.metric {
  position: relative;
  padding: 16px 18px;
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: 3px 3px 0 var(--paper-dark);
  transition: all 0.2s ease;
}

.metric:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--paper-dark);
}

.metric::after {
  content: '';
  position: absolute;
  bottom: 10px;
  left: 18px;
  right: 18px;
  height: 3px;
  border-radius: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--pen-blue) 0px, var(--pen-blue) 6px,
    var(--pen-green) 6px, var(--pen-green) 12px,
    var(--pen-yellow) 12px, var(--pen-yellow) 18px
  );
}

.metric__label {
  display: block;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.metric strong {
  display: block;
  color: var(--ink);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  line-height: 1;
}

/* 人物展示 */
.hero__visual {
  flex: 0 0 auto;
  position: relative;
  z-index: 1;
}

.portrait {
  position: relative;
  max-width: 380px;
  width: 100%;
  filter: drop-shadow(0 16px 32px rgba(120, 100, 60, 0.2));
  animation: portraitBounce 6s ease-in-out infinite;
}



/* 人物标签 */
.portrait__tag {
  position: absolute;
  top: -24px;
  right: -12px;
  z-index: 20;
  padding: 6px 16px;
  font-family: 'Ma Shan Zheng', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--pen-red);
  background: var(--paper);
  border: 2px solid var(--pen-red);
  border-radius: 8px;
  box-shadow: 3px 3px 0 var(--pen-red);
  transform: rotate(8deg);
  animation: tagBounce 3s ease-in-out infinite;
}

@keyframes tagBounce {
  0%, 100% { transform: rotate(8deg) translateY(0); }
  50% { transform: rotate(8deg) translateY(-4px); }
}

.portrait__base {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius) var(--radius) var(--radius) var(--radius);
  border: 2px solid var(--paper-dark);
}

/* 毛玻璃探索层 */
.portrait__reveal {
  position: absolute;
  inset: 0;
  background-image: url("./assets/portrait-reveal.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: 100% 100%;
  opacity: 0;
  transition: opacity 0.22s ease;
  pointer-events: none;
  border-radius: var(--radius);
  mask-image: linear-gradient(transparent, transparent);
  -webkit-mask-image: linear-gradient(transparent, transparent);
  mask-repeat: no-repeat;
  -webkit-mask-repeat: no-repeat;
  mask-size: 100% 100%;
  -webkit-mask-size: 100% 100%;
}

.hero--reveal-active .portrait__reveal { opacity: 1; }

/* 数据雨隐藏 */
.data-rain { display: none; }

/* ─── 通用 Section ─────────────────────── */
.product-detail,
.detail-suite {
  position: relative;
  padding: 80px 40px;
  background: var(--paper);
}

.section-heading { margin-bottom: 40px; }

.section-heading span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-faint);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-heading span::before {
  content: '✦';
  color: var(--pen-red);
  font-size: 10px;
}

.section-heading h2 {
  margin: 0;
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.1;
  color: var(--ink);
  position: relative;
  display: inline-block;
}

.section-heading h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  border-radius: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--pen-red) 0px, var(--pen-red) 8px,
    var(--pen-yellow) 8px, var(--pen-yellow) 16px,
    var(--pen-green) 16px, var(--pen-green) 24px,
    var(--pen-blue) 24px, var(--pen-blue) 32px
  );
}

/* 便利贴卡片 */
.detail-card,
.about-card,
.support-row,
.product-panel {
  position: relative;
  padding: 32px;
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all 0.25s ease;
  overflow: hidden;
}

.detail-card:hover,
.about-card:hover,
.support-row:hover,
.product-panel:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.detail-card--accent  { background: #fffef5; border-left: 5px solid var(--pen-yellow); }
.detail-card--pink    { background: #fff5f8; border-left: 5px solid var(--pen-pink); }
.detail-card--blue    { background: #f0f7ff; border-left: 5px solid var(--pen-blue); }
.detail-card--green   { background: #f0faf4; border-left: 5px solid var(--pen-green); }

.detail-card__eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  background: var(--pen-blue);
  color: #fff;
  border: 1px solid rgba(0,0,0,0.08);
}

.detail-card h3,
.product-panel h3,
.support-row h3 {
  margin: 10px 0 14px;
  font-family: 'Ma Shan Zheng', serif;
  font-size: clamp(22px, 3vw, 36px);
  line-height: 1.2;
  color: var(--ink);
}

.detail-card p,
.product-panel p,
.support-row p {
  margin: 0;
  color: var(--ink-light);
  font-size: 15px;
  line-height: 1.8;
}

/* 标签 */
.detail-tags,
.feature-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.detail-tags span,
.feature-grid span {
  display: inline-flex;
  align-items: center;
  padding: 5px 13px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  color: var(--ink-light);
  box-shadow: 2px 2px 0 var(--paper-dark);
  transition: all 0.2s ease;
}

.detail-tags span:hover,
.feature-grid span:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--paper-dark);
}

.feature-grid span:nth-child(3n+1) { background: #fff3e0; border-color: var(--pen-orange); }
.feature-grid span:nth-child(3n+2) { background: #e8f5e9; border-color: var(--pen-green); }
.feature-grid span:nth-child(3n+3) { background: #e3f2fd; border-color: var(--pen-blue); }

/* 规格网格 */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.spec-grid div {
  padding: 14px;
  border-radius: var(--radius-sm);
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  box-shadow: 2px 2px 0 var(--paper-dark);
}

.spec-grid span {
  display: block;
  color: var(--ink-faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.spec-grid strong {
  display: block;
  color: var(--ink);
  font-size: 22px;
  font-weight: 800;
}

/* 按钮 */
.product-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.product-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 3px 3px 0 var(--paper-dark);
  transition: all 0.2s ease;
}

.product-actions__primary {
  color: #fff;
  background: var(--pen-red);
  border: 1.5px solid rgba(0,0,0,0.1);
}

.product-actions__secondary {
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
}

.product-actions a:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--paper-dark);
}

/* ─── 滚动动画 ─────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── 动画 ─────────────────────────────── */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes dotPulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(0.7); }
}

@keyframes portraitBounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}

/* ─── Footer ───────────────────────────── */
.site-footer {
  position: relative;
  z-index: 20;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  padding: 12px 24px 40px;
  margin-top: -60px;
  background: var(--paper-dark);
  border-top: 2px dashed var(--paper-line);
  color: var(--ink-faint);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.site-footer a {
  color: var(--ink-faint);
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer a:hover { color: var(--pen-red); }

.footer-line {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
}

/* ─── Footer 扫码按钮 ─────────────────── */

.footer-qr__toggle {
  display: inline-flex;
  padding: 2px 8px;
  font-family: 'LXGW WenKai', 'Ma Shan Zheng', serif;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  border-radius: 12px;
  box-shadow: 1px 1px 0 var(--paper-dark);
  cursor: pointer;
  transition: all 0.2s ease;
  vertical-align: middle;
}

.footer-qr__toggle:hover {
  transform: translate(-1px, -1px);
  box-shadow: 2px 2px 0 var(--paper-dark);
}

.footer-qr__toggle[aria-expanded="true"] .footer-qr__arrow {
  transform: rotate(180deg);
}

.footer-qr__arrow {
  display: inline-block;
  transition: transform 0.3s ease;
}

/* ─── 二维码浮动面板 ────────────────────── */
.qr-float {
  position: absolute;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 16px;
  background: var(--paper);
  border: 2px solid var(--paper-line);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 var(--paper-dark), 0 8px 24px rgba(0,0,0,0.15);
  animation: fadeSlideIn 0.3s ease;
  transform: translateX(-50%);
}

.qr-float[hidden] {
  display: none;
}

.qr-float img {
  width: 160px;
  height: 160px;
  border-radius: 8px;
  border: 2px solid var(--paper-line);
}

.qr-float span {
  font-size: 13px;
  color: var(--ink-light);
}

.qr-float__close {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--ink);
  background: var(--paper);
  border: 2px solid var(--paper-line);
  border-radius: 50%;
  box-shadow: 2px 2px 0 var(--paper-dark);
  cursor: pointer;
  transition: all 0.2s ease;
}

.qr-float__close:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--paper-dark);
}

/* ─── 响应式 ───────────────────────────── */
@media (max-width: 920px) {
  .hero {
    flex-direction: column;
    padding: 40px 24px;
    gap: 40px;
  }

  .hero__content {
    max-width: 100%;
    text-align: center;
  }

  .metrics {
    grid-template-columns: 1fr;
    max-width: 280px;
    margin: 24px auto 0;
  }

  .portrait { max-width: 260px; }
  .product-detail, .detail-suite { padding: 60px 24px; }
}

@media (max-width: 560px) {
  .site-header {
    flex-wrap: wrap;
    width: calc(100% - 32px);
    gap: 10px;
  }

  .site-nav {
    gap: 4px;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .site-nav a {
    font-size: 12px;
    padding: 5px 10px;
    min-height: auto;
  }

  .site-header__cta { font-size: 12px; padding: 0 14px; }

  h1 { font-size: 36px; }

  .detail-card,
  .product-panel,
  .support-row { padding: 20px; }

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