/* ============================================================
   中望智典云图库 — 设计系统
   暗色为主，支持亮色切换；配色延续 CAD 插件端
   ============================================================ */

/* ---------- 主题变量：暗色（默认） ---------- */
:root {
  --bg:            #171a20;
  --bg-elev:       #1f232b;
  --surface:       #252930;
  --surface-2:     #2d323a;
  --surface-3:     #373c45;
  --border:        #3a404b;
  --border-strong: #5b616c;
  --accent:        #007acc;
  --accent-2:      #70c4ff;
  --accent-soft:   rgba(0, 122, 204, .14);
  --success:       #4ec9b0;
  --warn:          #e2b341;
  --text:          #e1e4e8;
  --text-dim:      #aab0b8;
  --text-faint:    #6e7580;
  --grid-line:     rgba(120, 132, 150, .09);
  --grid-line-maj: rgba(120, 132, 150, .16);
  --shadow-sm:     0 2px 8px rgba(0, 0, 0, .35);
  --shadow-md:     0 8px 28px rgba(0, 0, 0, .45);
  --shadow-lg:     0 20px 60px rgba(0, 0, 0, .55);
  --glow:          0 0 0 1px rgba(112, 196, 255, .35), 0 0 28px rgba(0, 122, 204, .28);
  --radius:        14px;
  --radius-sm:     9px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono",
          Consolas, "Courier New", monospace;
}

/* ---------- 主题变量：亮色 ---------- */
[data-theme="light"] {
  --bg:            #f4f6f9;
  --bg-elev:       #ffffff;
  --surface:       #ffffff;
  --surface-2:     #f7f9fb;
  --surface-3:     #eef1f5;
  --border:        #e2e6eb;
  --border-strong: #c8ccd0;
  --accent:        #0078d7;
  --accent-2:      #005a9e;
  --accent-soft:   rgba(0, 120, 215, .09);
  --success:       #0f9d76;
  --warn:          #b8860b;
  --text:          #1f2328;
  --text-dim:      #5b636e;
  --text-faint:    #8b939e;
  --grid-line:     rgba(60, 80, 110, .07);
  --grid-line-maj: rgba(60, 80, 110, .13);
  --shadow-sm:     0 1px 3px rgba(16, 24, 40, .08);
  --shadow-md:     0 6px 20px rgba(16, 24, 40, .1);
  --shadow-lg:     0 18px 48px rgba(16, 24, 40, .14);
  --glow:          0 0 0 1px rgba(0, 120, 215, .3), 0 0 24px rgba(0, 120, 215, .16);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .3s ease, color .3s ease;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; letter-spacing: -.02em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.container { width: min(1200px, 100% - 48px); margin-inline: auto; }
.mono { font-family: var(--mono); }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-size: 15px; font-weight: 600;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease,
              border-color .18s ease, color .18s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0098ff);
  color: #fff; box-shadow: 0 4px 16px rgba(0, 122, 204, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 26px rgba(0, 122, 204, .5); }
.btn-ghost {
  background: var(--surface-2); color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); transform: translateY(-2px); }
.btn-lg { padding: 15px 34px; font-size: 16px; border-radius: 12px; }
.btn-block { width: 100%; }

/* ---------- 徽章 / 标签 ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent-2);
  font-size: 13px; font-weight: 600; border: 1px solid rgba(112, 196, 255, .2);
}
.badge .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------- 区块通用 ---------- */
.section { padding: 104px 0; position: relative; }
.section-alt { background: var(--bg-elev); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.section-head .badge { margin-bottom: 20px; }
.section-title { font-size: clamp(30px, 4vw, 44px); margin-bottom: 16px; }
.section-title .hl {
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-sub { font-size: 17px; color: var(--text-dim); }

/* CAD 网格背景 */
.cad-grid {
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(0deg, var(--grid-line-maj) 0 1px, transparent 1px 160px),
    repeating-linear-gradient(90deg, var(--grid-line-maj) 0 1px, transparent 1px 160px);
}

/* ============================================================
   导航栏
   ============================================================ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s, box-shadow .3s;
}
.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
}
.nav-inner {
  display: flex; align-items: center; gap: 36px;
  height: 68px; width: min(1200px, 100% - 48px); margin-inline: auto;
}
.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 18px; letter-spacing: -.03em; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), #00a2ff);
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 4px 14px rgba(0, 122, 204, .4);
}
.logo-mark svg { width: 19px; height: 19px; }
.logo-text small { display: block; font-size: 10px; font-weight: 500; color: var(--text-faint); letter-spacing: .14em; }

.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a {
  padding: 8px 15px; border-radius: 8px; font-size: 15px; font-weight: 500;
  color: var(--text-dim); transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: var(--accent-2); background: var(--accent-soft); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  transition: color .2s, border-color .2s, transform .3s;
}
.theme-toggle:hover { color: var(--accent-2); border-color: var(--accent); transform: rotate(18deg); }
.theme-toggle svg { width: 18px; height: 18px; }
.nav-toggle { display: none; width: 38px; height: 38px; border-radius: 9px; background: var(--surface-2); border: 1px solid var(--border); }
.nav-toggle span { display: block; width: 17px; height: 2px; background: var(--text); margin: 3.5px auto; border-radius: 2px; transition: .3s; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative; padding: 168px 0 96px; overflow: hidden;
}
.hero .cad-grid {
  position: absolute; inset: 0; opacity: .8;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 32%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 78% 62% at 50% 32%, #000 30%, transparent 78%);
}
.hero-glow {
  position: absolute; width: 720px; height: 720px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 122, 204, .18), transparent 66%);
  top: -260px; left: 50%; transform: translateX(-50%); pointer-events: none;
}
.hero-inner {
  position: relative; display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 56px; align-items: center;
}
.hero-title {
  font-size: clamp(38px, 5.6vw, 64px); line-height: 1.1; margin: 22px 0 22px;
  letter-spacing: -.035em;
}
.hero-title .hl {
  background: linear-gradient(120deg, var(--accent-2) 10%, var(--accent) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: 18px; color: var(--text-dim); max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }
.hero-meta { display: flex; gap: 26px; flex-wrap: wrap; font-size: 14px; color: var(--text-faint); }
.hero-meta span { display: flex; align-items: center; gap: 7px; }
.hero-meta svg { width: 16px; height: 16px; color: var(--success); }

/* Hero 右侧：CAD 图块演示面板 */
.hero-visual {
  position: relative; border-radius: 18px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.viz-bar {
  display: flex; align-items: center; gap: 8px; padding: 11px 16px;
  background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.viz-bar i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.viz-bar .r { background: #ff5f57; } .viz-bar .y { background: #febc2e; } .viz-bar .g { background: #28c840; }
.viz-bar span {
  margin-left: 8px; font-family: var(--mono); font-size: 12px; color: var(--text-faint);
}
.viz-stage {
  position: relative; aspect-ratio: 1 / .92; padding: 18px;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 22px),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 22px);
}
.viz-stage svg.big-block { width: 100%; height: 100%; }
/* 大图块：CAD 描边绘制动画 */
.viz-stage .bp {
  fill: none; stroke: var(--accent-2); stroke-width: 2.2;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: var(--len, 600); stroke-dashoffset: var(--len, 600);
  animation: draw 2.6s cubic-bezier(.65,0,.35,1) forwards;
  filter: drop-shadow(0 0 6px rgba(112, 196, 255, .5));
}
@keyframes draw { to { stroke-dashoffset: 0; } }
.viz-stage .bp.d1 { animation-delay: .25s; }
.viz-stage .bp.d2 { animation-delay: .75s; }
.viz-stage .bp.d3 { animation-delay: 1.25s; }
.viz-stage .bp.d4 { animation-delay: 1.75s; }
/* 中心线（长划-点-长划，CAD 标准） */
.viz-stage .cl {
  stroke: var(--accent); stroke-width: 1; opacity: .55;
  stroke-dasharray: 16 4 3 4; animation: fadeIn 1s 2.4s both;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: .55; } }
/* 齿轮旋转组 */
.spin-slow { transform-origin: 160px 160px; animation: spin 26s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
/* 尺寸标注 */
.viz-dim {
  position: absolute; font-family: var(--mono); font-size: 11px;
  color: var(--accent-2); background: color-mix(in srgb, var(--bg) 82%, transparent);
  padding: 2px 7px; border-radius: 5px; border: 1px solid rgba(112,196,255,.28);
  animation: fadeInDim .8s both; pointer-events: none;
}
@keyframes fadeInDim { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* 浮动小图块装饰 */
.float-chip {
  position: absolute; width: 74px; height: 74px; border-radius: 14px;
  background: var(--surface-2); border: 1px solid var(--border);
  display: grid; place-items: center; box-shadow: var(--shadow-md);
  animation: float 6s ease-in-out infinite;
}
.float-chip svg { width: 40px; height: 40px; }
.float-chip.c1 { top: 12%; left: -34px; animation-delay: 0s; }
.float-chip.c2 { bottom: 16%; right: -30px; animation-delay: 1.4s; }
.float-chip.c3 { top: 46%; right: -42px; animation-delay: 2.6s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-13px); } }

/* ============================================================
   特性卡片
   ============================================================ */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
  padding: 30px; border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--border); transition: transform .25s, border-color .25s, box-shadow .25s;
  position: relative; overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(circle at 50% 0%, var(--accent-soft), transparent 70%);
  transition: opacity .3s; pointer-events: none;
}
.feature-card:hover { transform: translateY(-6px); border-color: var(--accent); box-shadow: var(--shadow-md); }
.feature-card:hover::after { opacity: 1; }
.feature-icon {
  width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-2); margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-card h3 { font-size: 18px; margin-bottom: 10px; }
.feature-card p { color: var(--text-dim); font-size: 15px; }

/* ============================================================
   图块展示
   ============================================================ */
.filter-tabs { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 42px; }
.filter-tab {
  padding: 9px 20px; border-radius: 999px; font-size: 14px; font-weight: 600;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim);
  transition: all .22s;
}
.filter-tab:hover { color: var(--text); border-color: var(--border-strong); }
.filter-tab.active {
  background: linear-gradient(135deg, var(--accent), #0098ff); color: #fff; border-color: transparent;
  box-shadow: 0 4px 14px rgba(0, 122, 204, .32);
}
.filter-tab .cnt { font-family: var(--mono); opacity: .65; margin-left: 6px; font-size: 12px; }

.block-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.block-card {
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  overflow: hidden; transition: transform .25s, border-color .25s, box-shadow .25s;
  position: relative; cursor: pointer;
}
.block-card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: var(--shadow-md); }
.block-view {
  position: relative; aspect-ratio: 1 / .82; display: grid; place-items: center; padding: 20px;
  background-image:
    repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 18px),
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 18px);
}
.block-view svg { width: 100%; height: 100%; color: var(--text-dim); transition: color .3s, transform .3s; }
.block-card:hover .block-view svg { color: var(--accent-2); transform: scale(1.07); }
/* 图块路径：进入视口时描边绘制 */
.block-view .bp {
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: var(--len, 500); stroke-dashoffset: var(--len, 500);
}
.block-card.in .block-view .bp { animation: draw 1.5s cubic-bezier(.65,0,.35,1) forwards; }
.block-card.in .block-view .bp:nth-child(2) { animation-delay: .18s; }
.block-card.in .block-view .bp:nth-child(3) { animation-delay: .36s; }
.block-card.in .block-view .bp:nth-child(4) { animation-delay: .54s; }
.block-card.in .block-view .bp:nth-child(5) { animation-delay: .72s; }
.block-card.in .block-view .bp:nth-child(6) { animation-delay: .9s; }
/* 十字中心线：hover 淡入 */
.center-cross {
  position: absolute; inset: 0; opacity: 0; transition: opacity .3s; pointer-events: none;
}
.block-card:hover .center-cross { opacity: 1; }
.center-cross span {
  position: absolute; background: var(--accent); opacity: .5;
}
.center-cross .h { left: 12%; right: 12%; top: 50%; height: 1px; background: repeating-linear-gradient(90deg, var(--accent) 0 14px, transparent 14px 19px, var(--accent) 19px 22px, transparent 22px 27px); }
.center-cross .v { top: 12%; bottom: 12%; left: 50%; width: 1px; background: repeating-linear-gradient(180deg, var(--accent) 0 14px, transparent 14px 19px, var(--accent) 19px 22px, transparent 22px 27px); }
/* 尺寸标注 */
.block-dim {
  position: absolute; right: 10px; bottom: 10px; font-family: var(--mono); font-size: 11px;
  color: var(--accent-2); background: color-mix(in srgb, var(--surface) 88%, transparent);
  padding: 2px 7px; border-radius: 5px; border: 1px solid rgba(112,196,255,.25);
  opacity: 0; transform: translateY(5px); transition: opacity .3s, transform .3s;
}
.block-card:hover .block-dim { opacity: 1; transform: none; }
.block-badge {
  position: absolute; top: 10px; left: 10px; font-size: 10px; font-weight: 700;
  padding: 3px 8px; border-radius: 5px; letter-spacing: .04em;
}
.block-badge.hot { background: rgba(226, 179, 65, .16); color: var(--warn); border: 1px solid rgba(226,179,65,.3); }
.block-badge.new { background: rgba(78, 201, 176, .14); color: var(--success); border: 1px solid rgba(78,201,176,.3); }
.block-badge.pro { background: var(--accent-soft); color: var(--accent-2); border: 1px solid rgba(112,196,255,.28); }

.block-meta { padding: 14px 16px 16px; border-top: 1px solid var(--border); }
.block-meta h4 { font-size: 14.5px; margin-bottom: 7px; font-weight: 600; }
.block-info { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-faint); }
.block-info .cat { font-family: var(--mono); }
.block-info .dl { display: flex; align-items: center; gap: 4px; }
.block-info .dl svg { width: 13px; height: 13px; }
.rating { color: var(--warn); font-family: var(--mono); }

/* ============================================================
   工作流步骤
   ============================================================ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.steps::before {
  content: ''; position: absolute; top: 34px; left: 8%; right: 8%; height: 1px;
  background: repeating-linear-gradient(90deg, var(--border-strong) 0 6px, transparent 6px 12px);
}
.step { text-align: center; position: relative; }
.step-num {
  width: 68px; height: 68px; margin: 0 auto 20px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--border-strong);
  display: grid; place-items: center; font-family: var(--mono); font-size: 22px; font-weight: 700;
  color: var(--accent-2); position: relative; z-index: 1; transition: all .3s;
}
.step:hover .step-num { border-color: var(--accent); box-shadow: var(--glow); transform: scale(1.08); }
.step h4 { font-size: 16.5px; margin-bottom: 9px; }
.step p { font-size: 14px; color: var(--text-dim); }

/* ============================================================
   数据统计
   ============================================================ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; padding: 30px 18px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.stat-num {
  font-family: var(--mono); font-size: clamp(28px, 3.6vw, 40px); font-weight: 700;
  color: var(--accent-2); margin-bottom: 8px; letter-spacing: -.02em;
}
.stat-label { font-size: 14px; color: var(--text-dim); }

/* ============================================================
   定价 / 充值
   ============================================================ */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.price-card {
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  padding: 34px 30px; position: relative; transition: transform .25s, border-color .25s, box-shadow .25s;
}
.price-card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.price-card.featured {
  border-color: var(--accent); box-shadow: var(--shadow-lg); transform: scale(1.035);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
}
.price-card.featured:hover { transform: scale(1.035) translateY(-5px); }
.price-tag {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), #0098ff); color: #fff;
  font-size: 12px; font-weight: 700; padding: 5px 16px; border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 122, 204, .4); white-space: nowrap;
}
.price-name { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.price-desc { font-size: 13.5px; color: var(--text-dim); margin-bottom: 22px; min-height: 40px; }
.price-amount { display: flex; align-items: baseline; gap: 5px; margin-bottom: 6px; }
.price-amount .cur { font-size: 20px; color: var(--text-dim); }
.price-amount .val { font-family: var(--mono); font-size: 42px; font-weight: 700; letter-spacing: -.03em; }
.price-amount .per { font-size: 14px; color: var(--text-faint); }
.price-note { font-size: 12.5px; color: var(--text-faint); margin-bottom: 24px; }
.price-features { display: grid; gap: 12px; margin-bottom: 28px; }
.price-features li { display: flex; gap: 10px; font-size: 14px; color: var(--text-dim); align-items: flex-start; }
.price-features svg { width: 17px; height: 17px; color: var(--success); flex-shrink: 0; margin-top: 3px; }
.price-features li.off { color: var(--text-faint); }
.price-features li.off svg { color: var(--text-faint); }

/* 积分充值档位 */
.recharge { margin-top: 70px; }
.recharge-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.recharge-item {
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  padding: 26px 20px; text-align: center; transition: all .25s; position: relative; cursor: pointer;
}
.recharge-item:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: var(--shadow-md); }
.recharge-item.hot { border-color: var(--accent); }
.recharge-item .r-tag {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #ff9f1a, #ffb84d); color: #1a1a1a;
  font-size: 11px; font-weight: 800; padding: 3px 12px; border-radius: 999px; white-space: nowrap;
}
.recharge-pts { font-family: var(--mono); font-size: 30px; font-weight: 700; color: var(--accent-2); }
.recharge-pts small { font-size: 14px; color: var(--text-dim); margin-left: 3px; }
.recharge-give { font-size: 12.5px; color: var(--success); margin: 6px 0 14px; font-weight: 600; min-height: 20px; }
.recharge-price { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.recharge-unit { font-size: 12px; color: var(--text-faint); font-family: var(--mono); }

/* 充值说明 */
.recharge-note {
  margin-top: 34px; padding: 22px 26px; border-radius: var(--radius);
  background: var(--surface); border: 1px dashed var(--border-strong);
  font-size: 14px; color: var(--text-dim);
}
.recharge-note strong { color: var(--text); }

/* ============================================================
   试用申请表单
   ============================================================ */
.trial-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 52px; align-items: start; }
.trial-benefits { display: grid; gap: 20px; margin-top: 30px; }
.benefit { display: flex; gap: 14px; align-items: flex-start; }
.benefit-icon {
  width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  background: var(--accent-soft); color: var(--accent-2); display: grid; place-items: center;
}
.benefit-icon svg { width: 20px; height: 20px; }
.benefit h4 { font-size: 15.5px; margin-bottom: 4px; }
.benefit p { font-size: 14px; color: var(--text-dim); }

.form-card {
  padding: 38px; border-radius: 18px; background: var(--surface);
  border: 1px solid var(--border); box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 13.5px; font-weight: 600; margin-bottom: 8px; color: var(--text);
}
.form-group label .req { color: #ff6b6b; margin-left: 2px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 15px; border-radius: 10px;
  background: var(--bg); border: 1px solid var(--border-strong);
  color: var(--text); font-size: 14.5px; outline: none;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-faint); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group textarea { resize: vertical; min-height: 96px; }
.form-check { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--text-dim); margin-bottom: 24px; }
.form-check input { width: 16px; height: 16px; margin-top: 3px; accent-color: var(--accent); flex-shrink: 0; }
.form-check a { color: var(--accent-2); text-decoration: underline; }
.form-success {
  display: none; text-align: center; padding: 40px 20px;
}
.form-success.show { display: block; animation: fadeInUp .5s both; }
.form-success .ok {
  width: 68px; height: 68px; border-radius: 50%; margin: 0 auto 20px;
  background: rgba(78, 201, 176, .14); color: var(--success); display: grid; place-items: center;
}
.form-success .ok svg { width: 32px; height: 32px; }
.form-success h3 { font-size: 21px; margin-bottom: 10px; }
.form-success p { color: var(--text-dim); font-size: 15px; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-band {
  padding: 72px 0; position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0060a3, #0098ff 55%, #00b0ff);
  text-align: center; color: #fff;
}
.cta-band .cad-grid { position: absolute; inset: 0; opacity: .25; }
.cta-band .container { position: relative; }
.cta-band h2 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 14px; }
.cta-band p { font-size: 17px; opacity: .92; margin-bottom: 30px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.cta-band .btn-primary { background: #fff; color: #0060a3; box-shadow: 0 6px 22px rgba(0,0,0,.22); }
.cta-band .btn-primary:hover { box-shadow: 0 10px 30px rgba(0,0,0,.3); }
.cta-band .btn-ghost { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.45); color: #fff; }
.cta-band .btn-ghost:hover { background: rgba(255,255,255,.24); border-color: #fff; color: #fff; }

/* ============================================================
   页脚
   ============================================================ */
.footer { background: var(--bg-elev); border-top: 1px solid var(--border); padding: 66px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 40px; margin-bottom: 46px; }
.footer-brand p { font-size: 14px; color: var(--text-dim); margin: 16px 0 20px; max-width: 300px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim); transition: all .22s;
}
.footer-social a:hover { color: var(--accent-2); border-color: var(--accent); transform: translateY(-2px); }
.footer-social svg { width: 17px; height: 17px; }
.footer h5 { font-size: 14px; margin-bottom: 18px; font-weight: 700; }
.footer ul { display: grid; gap: 11px; }
.footer ul a { font-size: 14px; color: var(--text-dim); transition: color .2s; }
.footer ul a:hover { color: var(--accent-2); }
.footer-bottom {
  padding-top: 24px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-faint);
}

/* ============================================================
   滚动进场
   ============================================================ */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .1s; } .reveal.d2 { transition-delay: .2s; }
.reveal.d3 { transition-delay: .3s; } .reveal.d4 { transition-delay: .4s; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 560px; margin-inline: auto; }
  .float-chip { display: none; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .block-grid { grid-template-columns: repeat(3, 1fr); }
  .recharge-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 34px; }
  .steps::before { display: none; }
  .trial-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; gap: 4px;
    background: var(--bg-elev); border-bottom: 1px solid var(--border);
    padding: 16px; transform: translateY(-130%); transition: transform .3s;
    box-shadow: var(--shadow-md); margin: 0;
  }
  .nav-links.open { transform: none; }
  .nav-links a { padding: 12px 16px; }
  .nav-toggle { display: block; }
  .nav-actions .btn { display: none; }
  .section { padding: 76px 0; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .price-card.featured:hover { transform: translateY(-5px); }
  .block-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .container { width: calc(100% - 32px); }
  .features { grid-template-columns: 1fr; }
  .block-grid { grid-template-columns: 1fr; }
  .recharge-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 20px; }
  .hero { padding: 132px 0 70px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* 无障碍：减弱动效 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .block-view .bp { stroke-dashoffset: 0 !important; }
}