/* ============================================================
   Memory Poster Studio — 全站共享样式（移动优先）
   纯本地、无外部字体/图片依赖；断点 480 / 768 / 1024 / 1440
   ============================================================ */

/* ---------- 设计变量：深夜蓝 / 琥珀金 / 暖白 ---------- */
:root {
  --color-bg: #0d1b3e;          /* 深夜蓝（页面底） */
  --color-surface: #16264f;     /* 次深蓝（卡片/面板） */
  --color-surface-2: #1d3160;
  --color-text: #f6efe6;       /* 暖白 */
  --color-muted: rgba(246, 239, 230, .72);
  --color-faint: rgba(246, 239, 230, .5);
  --color-primary: #e8b478;    /* 琥珀金（主操作/品牌） */
  --color-primary-strong: #f0c693;
  --color-accent: #8fb0e8;     /* 辅助冷蓝（链接/信息） */
  --card-radius: 16px;
  --shadow: 0 12px 32px rgba(3, 9, 26, .45);
  --shadow-soft: 0 6px 18px rgba(3, 9, 26, .35);
  --border: 1px solid rgba(246, 239, 230, .12);
  --nav-h: 60px;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', sans-serif;
  --font-display: Georgia, 'Times New Roman', 'Songti SC', 'SimSun', serif;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
  /* 固定导航占位 */
  padding-top: var(--nav-h);
  overflow-x: hidden;
}

img, canvas { max-width: 100%; }

a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-primary-strong); }

h1, h2, h3 { line-height: 1.25; font-weight: 700; }

/* 360px 窄屏不出现横向滚动 */
.wrap, .container { width: 100%; }

/* ---------- 版心 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ============================================================
   固定顶部导航
   ============================================================ */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  background: rgba(13, 27, 62, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(246, 239, 230, .1);
}
.site-nav .nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 品牌 */
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
}
.nav-logo .logo-mark { color: var(--color-primary); font-size: 19px; }
.nav-logo:hover { color: var(--color-text); }

/* 桌面菜单（768 以下隐藏） */
.nav-menu {
  display: none;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  flex: 1;
}
.nav-menu > li { list-style: none; position: relative; }
.nav-menu > li > a,
.nav-dropdown > a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-height: 40px;
  padding: 0 12px;
  color: var(--color-muted);
  font-size: 15px;
  border-radius: 10px;
  white-space: nowrap;
}
.nav-menu a:hover { color: var(--color-text); background: rgba(246, 239, 230, .07); }
.nav-menu a[aria-current="page"] { color: var(--color-primary); }
.nav-dropdown .caret { font-size: 10px; opacity: .8; }

/* 工具下拉面板 */
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 300px;
  background: var(--color-surface);
  border: var(--border);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
  padding: 14px;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu { display: grid; }
.nav-dropdown-menu .dd-group { margin-bottom: 10px; }
.nav-dropdown-menu .dd-group:last-child { margin-bottom: 0; }
.dd-group-title {
  display: block;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 700;
  padding: 2px 8px 6px;
}
.dd-group a {
  display: block;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-muted);
  white-space: nowrap;
}
.dd-group a:hover { color: var(--color-text); background: rgba(246, 239, 230, .07); }

/* 右侧操作区 */
.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 语言按钮（英文页显示「中文」，反之显示 EN） */
.lang-switch,
#lang-switch {
  appearance: none;
  border: 1px solid rgba(232, 180, 120, .55);
  background: transparent;
  color: var(--color-primary);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  cursor: pointer;
}
.lang-switch:hover, #lang-switch:hover {
  background: rgba(232, 180, 120, .12);
}

/* Pro 徽章 */
.pro-badge {
  display: none;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--color-primary);
  border: 1px solid rgba(232, 180, 120, .45);
  border-radius: 999px;
  padding: 3px 10px;
  white-space: nowrap;
}

/* 汉堡按钮（768 以下显示） */
.nav-toggle,
#nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0 10px;
  background: transparent;
  border: var(--border);
  border-radius: 10px;
  cursor: pointer;
}
.nav-toggle span, #nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  border-radius: 2px;
}

/* ---------- 移动端抽屉菜单 ---------- */
.mobile-menu,
#mobile-menu {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  z-index: 999;
  max-height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  background: rgba(13, 27, 62, .98);
  border-bottom: 1px solid rgba(246, 239, 230, .1);
  padding: 12px 16px 24px;
  display: none;
}
.mobile-menu.is-open,
#mobile-menu.is-open { display: block; }

.mobile-menu ul { list-style: none; }
.mobile-menu > ul > li { border-bottom: 1px solid rgba(246, 239, 230, .08); }
.mobile-menu > ul > li > a {
  display: block;
  padding: 14px 4px;
  color: var(--color-text);
  font-size: 16px;
  min-height: 48px;
}
.mobile-menu .mm-group-title {
  padding: 14px 4px 6px;
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 700;
}
.mobile-menu .mm-group ul { padding-bottom: 6px; }
.mobile-menu .mm-group a {
  display: block;
  padding: 9px 12px;
  font-size: 14.5px;
  color: var(--color-muted);
  border-radius: 8px;
}
.mobile-menu .mm-group a:hover { background: rgba(246, 239, 230, .07); color: var(--color-text); }

/* ============================================================
   Hero（照片背景 + 深色渐变遮罩 + 白色标题）
   ============================================================ */
.hero {
  position: relative;
  min-height: 380px;
  display: flex;
  align-items: center;
  background-color: var(--color-surface);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(13, 27, 62, .55) 0%, rgba(13, 27, 62, .82) 100%),
    radial-gradient(120% 90% at 30% 20%, rgba(13, 27, 62, .25), rgba(13, 27, 62, .85));
}
.hero .container { position: relative; padding-top: 48px; padding-bottom: 48px; }
.hero h1 {
  color: #fff;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.2vw, 46px);
  max-width: 760px;
  margin-bottom: 14px;
}
.hero .hero-sub {
  color: rgba(255, 255, 255, .86);
  font-size: clamp(15px, 2.4vw, 18px);
  max-width: 680px;
}
.hero .hero-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 区块 ---------- */
.section { padding: 48px 0; }
.section-tight { padding: 28px 0; }
.section-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 30px);
  margin-bottom: 8px;
}
.section-sub { color: var(--color-muted); margin-bottom: 28px; max-width: 720px; }

/* ============================================================
   卡片网格（移动优先：1 → 2 → 3 → 4 列）
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

/* ---------- 照片卡 ---------- */
.photo-card {
  position: relative;
  display: block;
  min-height: 240px;
  border-radius: var(--card-radius);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  isolation: isolate;
  transition: transform .25s ease, box-shadow .25s ease;
}
.photo-card:hover {
  transform: translateY(-4px) scale(1.015);
  box-shadow: var(--shadow);
}
.photo-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}
.photo-card::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(13, 27, 62, .08) 35%, rgba(13, 27, 62, .85) 100%);
}
.photo-card .card-title {
  position: absolute;
  left: 16px; right: 52px; bottom: 14px;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  text-shadow: 0 1px 8px rgba(0, 0, 0, .5);
}
.photo-card .card-meta {
  position: absolute;
  left: 16px; bottom: 0; /* 预留，默认隐藏 */
  display: none;
}

/* 收藏心形按钮（卡片右上） */
.fav-btn {
  position: absolute;
  top: 12px; right: 12px;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  line-height: 1;
  color: #fff;
  background: rgba(13, 27, 62, .5);
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 999px;
  cursor: pointer;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  transition: transform .15s ease, background .15s ease, color .15s ease;
}
.fav-btn:hover { transform: scale(1.1); }
.fav-btn.is-active {
  color: var(--color-primary);
  background: rgba(13, 27, 62, .62);
  border-color: var(--color-primary);
}

/* 无图时的占位封面（供缺图环境兜底） */
.photo-card.no-img {
  background: linear-gradient(145deg, var(--color-surface), var(--color-bg));
}

/* ---------- 文章卡 ---------- */
.article-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border-radius: var(--card-radius);
  background: var(--color-surface);
  border: var(--border);
  box-shadow: var(--shadow-soft);
  color: var(--color-text);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(232, 180, 120, .4);
  color: var(--color-text);
}
.article-card .article-tag {
  font-size: 12px;
  color: var(--color-primary);
  letter-spacing: .05em;
  text-transform: uppercase;
}
.article-card h3 { font-size: 18px; font-family: var(--font-display); }
.article-card p { color: var(--color-muted); font-size: 14.5px; }
.article-card .article-more { margin-top: auto; font-size: 14px; color: var(--color-accent); }

/* ============================================================
   工具页：左表单 / 右预览（1024 以上双栏）
   ============================================================ */
.tool-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}
.tool-panel,
.tool-preview {
  background: var(--color-surface);
  border: var(--border);
  border-radius: var(--card-radius);
  padding: 20px;
  box-shadow: var(--shadow-soft);
}
.tool-panel h2,
.tool-preview h2 { font-size: 18px; margin-bottom: 16px; }

/* ---------- 表单控件（触控目标 ≥44px） ---------- */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 6px;
}
.form-control,
input[type="text"],
input[type="date"],
input[type="datetime-local"],
input[type="number"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  font: inherit;
  font-size: 15px;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid rgba(246, 239, 230, .18);
  border-radius: 10px;
}
.form-control:focus,
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(232, 180, 120, .18);
}
select option { background: var(--color-bg); color: var(--color-text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-check {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 14.5px;
  color: var(--color-muted);
}
.form-check input { width: 18px; height: 18px; accent-color: var(--color-primary); }
.field-hint { font-size: 12.5px; color: var(--color-faint); margin-top: 5px; }

/* 自定义坐标（选择 Custom 时显示） */
.custom-coords { display: none; }
.custom-coords.is-visible { display: block; }

/* 分段选项（主题/版式开关） */
.seg-group { display: flex; flex-wrap: wrap; gap: 8px; }
.seg-group input { position: absolute; opacity: 0; pointer-events: none; }
.seg-group label {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(246, 239, 230, .2);
  font-size: 14px;
  color: var(--color-muted);
  cursor: pointer;
}
.seg-group input:checked + label {
  color: #1a1206;
  background: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: 700;
}
.seg-group input:focus-visible + label { box-shadow: 0 0 0 3px rgba(232, 180, 120, .3); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 24px;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  border-radius: 999px;
  border: 1px solid rgba(246, 239, 230, .2);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #1c1306;
  box-shadow: 0 8px 20px rgba(232, 180, 120, .25);
}
.btn-primary:hover { background: var(--color-primary-strong); color: #1c1306; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; transform: none; }

/* ---------- Canvas 预览 ---------- */
.tool-preview { position: sticky; top: calc(var(--nav-h) + 16px); }
.canvas-frame {
  width: 100%;
  background: #060d22;
  border: var(--border);
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 16px;
  text-align: center;
}
.canvas-frame canvas {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
}
.preview-actions { display: flex; flex-direction: column; gap: 10px; }
.preview-actions .row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  align-items: center;
}

/* ============================================================
   广告位（当前全部隐藏；Pro 上线后启用）
   ============================================================ */
.ad-slot { display: none; }

/* ============================================================
   面包屑 / FAQ / 文章正文
   ============================================================ */
.breadcrumb {
  padding: 18px 0 4px;
  font-size: 13px;
  color: var(--color-faint);
}
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li::after { content: '/'; margin-left: 6px; opacity: .5; }
.breadcrumb li:last-child::after { content: ''; }
.breadcrumb a { color: var(--color-muted); }
.breadcrumb li[aria-current] { color: var(--color-text); }

.faq { margin-top: 8px; }
.faq details {
  background: var(--color-surface);
  border: var(--border);
  border-radius: 12px;
  padding: 4px 18px;
  margin-bottom: 10px;
}
.faq summary {
  min-height: 52px;
  display: flex;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: '+';
  color: var(--color-primary);
  font-size: 20px;
  margin-right: 10px;
  line-height: 1;
}
.faq details[open] summary::before { content: '\2212'; }
.faq details > div { padding: 0 0 16px 30px; color: var(--color-muted); font-size: 14.5px; }

.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 16.5px;
}
.article-body h2 { font-family: var(--font-display); font-size: 24px; margin: 32px 0 12px; }
.article-body h3 { font-size: 19px; margin: 24px 0 10px; }
.article-body p { margin-bottom: 16px; color: rgba(246, 239, 230, .88); }
.article-body ul, .article-body ol { margin: 0 0 16px 22px; color: rgba(246, 239, 230, .88); }
.article-body li { margin-bottom: 8px; }

/* 工具页双语长文区块 */
.lang-copy { max-width: 860px; }
.lang-copy h2 { font-family: var(--font-display); font-size: 24px; margin: 24px 0 12px; }
.lang-copy h3 { font-size: 18px; margin: 20px 0 8px; color: var(--color-primary); }
.lang-copy p { color: var(--color-muted); margin-bottom: 14px; }

/* 相关工具网格标题行 */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

/* ============================================================
   页脚（多列）
   ============================================================ */
.site-footer {
  margin-top: 48px;
  background: #081129;
  border-top: 1px solid rgba(246, 239, 230, .1);
  padding: 44px 0 24px;
  color: var(--color-muted);
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-bottom: 28px;
}
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand p { max-width: 340px; }
.site-footer h4 {
  color: var(--color-text);
  font-size: 13px;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--color-muted); }
.site-footer a:hover { color: var(--color-primary); }
.footer-pro {
  display: inline-block;
  margin: 4px 0 12px;
}
.footer-bottom {
  border-top: 1px solid rgba(246, 239, 230, .1);
  padding-top: 18px;
  font-size: 12.5px;
  color: var(--color-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.footer-bottom a { color: var(--color-faint); text-decoration: underline; }

/* ============================================================
   通用工具类
   ============================================================ */
.text-center { text-align: center; }
.muted { color: var(--color-muted); }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.hidden { display: none !important; }

/* ============================================================
   响应式断点（移动优先 min-width）
   ============================================================ */

/* ≥480：微调间距、下载行并排 */
@media (min-width: 480px) {
  .container { padding: 0 20px; }
  .preview-actions .row { grid-template-columns: 1fr auto; }
}

/* ≥768：双列卡片；汉堡隐藏、桌面全菜单显示 */
@media (min-width: 768px) {
  :root { --nav-h: 64px; }
  .container { padding: 0 24px; }
  .nav-menu { display: flex; }
  .nav-toggle, #nav-toggle { display: none; }
  .pro-badge { display: inline-flex; }
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: 440px; }
  .section { padding: 60px 0; }
}

/* ≥1024：三列卡片 + 工具双栏；下拉面板加宽双列 */
@media (min-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .tool-layout { grid-template-columns: 380px 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
  .nav-dropdown-menu {
    min-width: 560px;
    grid-template-columns: 1fr 1fr;
    gap: 0 18px;
  }
}

/* ≥1440：四列卡片 */
@media (min-width: 1440px) {
  .card-grid { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}

/* ============================================================
   打印：隐藏导航与按钮
   ============================================================ */
@media print {
  .site-nav,
  .mobile-menu,
  .nav-toggle,
  .fav-btn,
  .btn,
  .preview-actions,
  .tool-panel,
  .ad-slot,
  .breadcrumb,
  .site-footer .footer-grid,
  .faq,
  .related-tools { display: none !important; }
  body { background: #fff; color: #000; padding-top: 0; }
  .tool-layout { display: block; }
  .canvas-frame { border: none; padding: 0; background: #fff; }
}