/* ==========================================================================
   a frog · 软件工具箱 (dev.scy.cool)
   Minimalist Aesthetic System · 极简主义设计系统
   ========================================================================== */

:root {
  --bg: #f9faf8;
  --surface: #ffffff;
  --surface-hover: #f4f5f2;
  --line: #e4e7e1;
  --line-strong: #d0d5cc;
  
  --ink: #17231c;
  --ink-secondary: #57655c;
  --ink-muted: #85948a;
  
  --accent: #176448;
  --accent-hover: #0f4d36;
  --accent-soft: #edf5f0;
  
  --wrong-bg: #fbeee8;
  --wrong-text: #b84c38;
  --right-bg: #eaf5ec;
  --right-text: #176448;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 28px;
  width: 100%;
}

/* 顶部导航 */
header {
  height: 80px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.brand span {
  font-weight: 400;
  color: var(--ink-muted);
  font-size: 0.95rem;
}
nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--ink-secondary);
}
nav a:hover {
  color: var(--ink);
}

/* 主内容区 */
main {
  flex: 1;
  padding-bottom: 72px;
}

/* Hero 标题区 */
.hero {
  padding: 64px 0 44px;
}
.hero-tag {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 750;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 16px;
}
.hero p {
  font-size: 1.1rem;
  color: var(--ink-secondary);
  max-width: 620px;
  line-height: 1.7;
}

/* 软件展示容器 */
.product-showcase {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 0.9fr;
}

/* 左侧详情与下载区 */
.product-main {
  padding: 40px;
  display: flex;
  flex-direction: column;
}
.product-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.version-pill {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 3px 10px;
  border-radius: 9999px;
  font-family: var(--font-mono);
}
.release-date {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.product-title {
  font-size: 1.85rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.product-subtitle {
  font-size: 0.92rem;
  color: var(--ink-muted);
  margin-bottom: 18px;
}

.product-desc {
  font-size: 0.96rem;
  color: var(--ink-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

/* 核心特性标签 */
.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.feature-tags span {
  font-size: 0.8rem;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink-secondary);
  background: var(--bg);
}

/* 下载按钮矩阵 */
.download-section-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.download-buttons {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.dl-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 18px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  transition: all 0.15s ease;
}
.dl-btn:hover {
  background: var(--surface-hover);
  border-color: var(--line-strong);
  transform: translateY(-1px);
}
.dl-btn.primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.dl-btn.primary:hover {
  background: var(--accent-hover);
}
.dl-btn-label {
  display: flex;
  align-items: center;
  gap: 8px;
}
.dl-btn-sub {
  font-size: 0.78rem;
  font-weight: 400;
  opacity: 0.85;
}
.dl-btn-arrow {
  font-size: 1rem;
}

/* 伸缩抽屉 / Accordions */
.accordion-group {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

details {
  font-size: 0.88rem;
  color: var(--ink-secondary);
}
summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  user-select: none;
  padding: 6px 0;
  outline: none;
  transition: color 0.15s ease;
}
summary:hover {
  color: var(--accent);
}
summary::marker {
  color: var(--ink-muted);
}
.accordion-content {
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-top: 8px;
  font-size: 0.84rem;
  line-height: 1.65;
}
.accordion-content ul {
  padding-left: 18px;
}
.accordion-content li {
  margin-bottom: 6px;
}
.accordion-content li:last-child {
  margin-bottom: 0;
}

/* SHA256 列表 */
.sha-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sha-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
}
.sha-copy-btn {
  color: var(--accent);
  font-size: 0.74rem;
  font-family: var(--font-sans);
  font-weight: 500;
  padding: 2px 6px;
}
.sha-copy-btn:hover {
  text-decoration: underline;
}

/* 右侧产品预览 / 对照演示区 */
.product-preview {
  background: #f1f4ee;
  border-left: 1px solid var(--line);
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.mock-window {
  width: 100%;
  max-width: 360px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 16px 36px -12px rgba(23, 35, 28, 0.08);
  overflow: hidden;
}
.mock-bar {
  height: 36px;
  background: #fafbfa;
  border-bottom: 1px solid var(--line);
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.mock-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #d8ded5;
}
.mock-bar-title {
  margin-left: 6px;
  font-size: 0.74rem;
  color: var(--ink-muted);
}

.mock-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.mock-heading {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
}

.diff-card {
  padding: 12px 14px;
  background: #fafbfa;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.84rem;
}
.diff-label {
  display: block;
  font-size: 0.72rem;
  color: var(--ink-muted);
  margin-bottom: 4px;
}
.diff-del {
  background: var(--wrong-bg);
  color: var(--wrong-text);
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 500;
}
.diff-ins {
  background: var(--right-bg);
  color: var(--right-text);
  padding: 1px 4px;
  border-radius: 3px;
  font-weight: 500;
}

.mock-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.74rem;
  color: var(--accent);
  font-weight: 600;
  padding-top: 4px;
}

.preview-caption {
  font-size: 0.78rem;
  color: var(--ink-muted);
  text-align: center;
}

/* 页脚 */
footer {
  border-top: 1px solid var(--line);
  padding: 36px 0;
  font-size: 0.84rem;
  color: var(--ink-muted);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* 提示条 (Toast) */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--ink);
  color: #ffffff;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.82rem;
  opacity: 0;
  transform: translateY(12px);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  z-index: 100;
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式适配 */
@media (max-width: 820px) {
  .product-showcase {
    grid-template-columns: 1fr;
  }
  .product-main {
    padding: 28px 24px;
  }
  .product-preview {
    border-left: none;
    border-top: 1px solid var(--line);
    padding: 32px 24px;
  }
  .hero {
    padding: 44px 0 32px;
  }
}