@import url('https://fonts.googleapis.com/css2?family=Kalam:wght@400;700&family=Patrick+Hand&display=swap');

/* =============================================
   CSS 自定义属性
   ============================================= */
:root {
  --c-black: #000000;
  --c-white: #ffffff;
  --c-ink: #0a0a0a;
  --c-paper: #f5f2ec;
  --c-accent: #e8001a;
  --c-accent2: #b8001a;
  --c-mid: #1a1a1a;
  --c-line: #333333;
  --c-muted: #666666;
  --c-hover: #e8001a;
  --font-hand: 'Kalam', 'Patrick Hand', cursive;
  --font-body: 'Patrick Hand', 'Kalam', cursive;
  --font-mono: 'Courier New', monospace;
  --nav-h: 68px;
  --radius-card: 28px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --reveal-duration: 0.6s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 17px;
  background: var(--c-black);
  color: var(--c-white);
}

body, body.dark-theme {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  background: var(--c-black);
  color: var(--c-white);
  overflow-x: hidden;
}

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

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

ul, menu {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input {
  font-family: inherit;
}

article {
  scroll-margin-top: calc(var(--nav-h) + 12px);
}

hr {
  border: none;
  border-top: 1px solid var(--c-line);
  margin: 0.75rem 0;
}

/* =============================================
   Site Wrapper
   ============================================= */
.site-wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* =============================================
   全屏遮罩菜单 (details > summary + menu > li > a)
   ============================================= */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}

.nav-overlay[open] {
  pointer-events: all;
}

.nav-overlay > summary {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 1100;
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  list-style: none;
  background: var(--c-black);
  border: 1px solid var(--c-white);
  padding: 8px;
  pointer-events: all;
}

.nav-overlay > summary::-webkit-details-marker { display: none; }
.nav-overlay > summary::marker { display: none; }

.hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-white);
  transition: opacity var(--transition);
}

.close-icon {
  display: none;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--c-white);
}

.nav-overlay[open] > summary .hamburger-bar {
  display: none;
}

.nav-overlay[open] > summary .close-icon {
  display: block;
}

.nav-overlay > menu {
  position: fixed;
  inset: 0;
  background: var(--c-black);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  z-index: 1050;
  border-left: 3px solid var(--c-accent);
  animation: menuReveal 0.35s cubic-bezier(0.4,0,0.2,1) both;
}

@keyframes menuReveal {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

.nav-overlay > menu > li {
  width: 100%;
  text-align: center;
  border-bottom: 1px solid var(--c-line);
}

.nav-overlay > menu > li:first-child {
  border-top: 1px solid var(--c-line);
}

.nav-overlay > menu > li > a {
  display: block;
  padding: 1.2rem 2rem;
  font-family: var(--font-hand);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.05em;
  transition: color var(--transition), background var(--transition);
}

.nav-overlay > menu > li > a:hover,
.nav-overlay > menu > li > a:focus {
  color: var(--c-accent);
  background: rgba(232,0,26,0.07);
  outline: none;
}

/* =============================================
   Header / Top Nav
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--nav-h);
  background: var(--c-black);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  gap: 16px;
}

.header-brand {
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-brand a {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.brand-text {
  font-family: var(--font-hand);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-left {
  justify-content: flex-start;
}

.nav-right {
  justify-content: flex-end;
}

.nav-left ul,
.nav-right ul {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-left ul li a,
.nav-right ul li a {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 14px;
  font-family: var(--font-hand);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.04em;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.nav-left ul li a:hover,
.nav-right ul li a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

.cta-btn {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  font-family: var(--font-hand);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-black);
  background: var(--c-white);
  border: 2px solid var(--c-white);
  letter-spacing: 0.06em;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  margin-left: 12px;
}

.cta-btn:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-white);
}

.hamburger-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--c-line);
  margin-left: 10px;
  padding: 10px 8px;
}

.hamburger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-white);
}

/* =============================================
   Hero Section
   ============================================= */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: grid;
  grid-template-rows: 1fr;
  overflow: hidden;
  margin-top: var(--nav-h);
}

.hero-media-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.4) contrast(1.1);
}

/* 斜切色带分割 */
.hero-slash {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 120px;
  background: var(--c-black);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0 100%);
  z-index: 2;
}

.hero-text-layer {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  padding: 80px 60px 140px;
  text-align: right;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
  border: 1px solid var(--c-accent);
  padding: 4px 12px;
  display: inline-block;
}

.hero-h1 {
  font-family: var(--font-hand);
  font-size: clamp(2.4rem, 6vw, 5.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-white);
  max-width: 700px;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.hero-desc {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 32px;
  font-family: var(--font-hand);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  background: var(--c-accent);
  border: 2px solid var(--c-accent);
  letter-spacing: 0.06em;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.hero-cta:hover {
  background: transparent;
  color: var(--c-accent);
  transform: translateY(-2px);
}

/* =============================================
   Main Content: main > div.wrap > article > section
   ============================================= */
.site-main {
  flex: 1;
  background: var(--c-black);
}

.wrap {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.content-section {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding: 72px 0 96px;
  align-items: start;
}

/* =============================================
   Aside / Sidebar Left
   ============================================= */
.sidebar-left {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  border: 1px solid var(--c-line);
  border-radius: 0;
}

.aside-inner {
  padding: 24px 18px;
}

.aside-title {
  font-family: var(--font-hand);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-muted);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.aside-nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 8px;
}

.aside-nav li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  border-bottom: 1px solid var(--c-line);
  line-height: 1.4;
  transition: color var(--transition), padding-left var(--transition);
}

.aside-nav li:last-child a {
  border-bottom: none;
}

.aside-nav li a:hover {
  color: var(--c-accent);
  padding-left: 6px;
}

.aside-tagline {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
}

.aside-tagline span {
  font-family: var(--font-hand);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-accent);
  text-transform: uppercase;
}

/* =============================================
   Main Article
   ============================================= */
.main-article {
  min-width: 0;
}

.article-content {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.9);
}

/* ---- 正文内 article 样式（page.content 注入的区块） ---- */
.article-content article {
  margin-bottom: 80px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--c-line);
}

.article-content article:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.article-content h2 {
  font-family: var(--font-hand);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 12px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.article-content h2 + hr {
  border-top: 2px solid var(--c-accent);
  margin-bottom: 28px;
}

.article-content h3 {
  font-family: var(--font-hand);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-white);
  margin-top: 40px;
  margin-bottom: 12px;
}

.article-content h3 + hr {
  border-top: 1px solid var(--c-line);
  margin-bottom: 20px;
}

.article-content p {
  margin-bottom: 1.1rem;
  color: rgba(255,255,255,0.85);
}

.article-content ul,
.article-content ol {
  padding-left: 1.4em;
  margin-bottom: 1.2rem;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* Drop cap for first paragraph of first article */
.article-content article:first-child > p:first-of-type::first-letter {
  float: left;
  font-family: var(--font-hand);
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 0.85;
  margin: 4px 10px 0 0;
  color: var(--c-accent);
  border-right: 2px solid var(--c-accent);
  padding-right: 10px;
}

/* Pull quote */
.article-content blockquote {
  border-left: 4px solid var(--c-accent);
  padding: 20px 24px;
  margin: 32px 0;
  background: rgba(232,0,26,0.05);
  font-family: var(--font-hand);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--c-white);
  line-height: 1.6;
}

.article-content blockquote::before {
  content: '\201C';
  font-size: 3rem;
  color: var(--c-accent);
  line-height: 0;
  vertical-align: -0.7em;
  margin-right: 6px;
}

/* figure / figcaption */
.article-content figure {
  margin: 32px 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.article-content figcaption {
  padding: 10px 16px;
  font-size: 0.8rem;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
}

/* Cards in content */
.article-content .card,
.article-content [class*="card"] {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-card);
  padding: 24px;
  background: transparent;
  transition: border-color var(--transition), transform var(--transition);
}

.article-content .card:hover,
.article-content [class*="card"]:hover {
  border-color: var(--c-accent);
  transform: translateY(-3px);
}

/* Tables */
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.article-content th,
.article-content td {
  padding: 10px 14px;
  border: 1px solid var(--c-line);
  text-align: left;
}

.article-content th {
  background: var(--c-mid);
  font-family: var(--font-hand);
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* Links in content */
.article-content a {
  color: var(--c-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.article-content a:hover {
  border-bottom-color: var(--c-accent);
}

/* =============================================
   Footer
   ============================================= */
.site-footer {
  background: var(--c-ink);
  border-top: 3px solid var(--c-accent);
  position: relative;
}

.footer-top-band {
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--c-accent) 0,
    var(--c-accent) 20px,
    transparent 20px,
    transparent 32px
  );
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 48px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 64px 24px 48px;
}

.footer-col-title {
  font-family: var(--font-hand);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--c-muted);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-col-title + hr {
  margin-bottom: 20px;
  border-top-color: var(--c-line);
}

.footer-logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  margin-bottom: 10px;
}

.footer-keyword {
  font-size: 0.75rem;
  color: var(--c-accent);
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  margin-top: 8px;
}

.footer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.footer-nav-list li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 0;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.65);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition);
}

.footer-nav-list li:last-child a {
  border-bottom: none;
}

.footer-nav-list li a:hover {
  color: var(--c-accent);
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.contact-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--c-muted);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.footer-contact-item a {
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
}

.footer-contact-item a:hover {
  color: var(--c-accent);
}

.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sub-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.05em;
}

.sub-row {
  display: flex;
  gap: 0;
  height: 44px;
}

.sub-input {
  flex: 1;
  height: 44px;
  padding: 0 14px;
  background: transparent;
  border: 1px solid var(--c-line);
  border-right: none;
  color: var(--c-white);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition);
  min-width: 0;
}

.sub-input:focus {
  border-color: var(--c-accent);
}

.sub-input::placeholder {
  color: var(--c-muted);
}

.sub-btn {
  height: 44px;
  padding: 0 18px;
  background: var(--c-accent);
  border: 1px solid var(--c-accent);
  color: var(--c-white);
  font-family: var(--font-hand);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: background var(--transition);
  white-space: nowrap;
}

.sub-btn:hover {
  background: var(--c-accent2);
  border-color: var(--c-accent2);
}

.footer-bottom {
  border-top: 1px solid var(--c-line);
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-bottom-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  justify-content: center;
}

.footer-bottom-nav li a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition);
  border-right: 1px solid var(--c-line);
}

.footer-bottom-nav li:last-child a {
  border-right: none;
}

.footer-bottom-nav li a:hover {
  color: var(--c-accent);
}

.copyright {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.35);
  text-align: center;
}

.footer-note {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.25);
  text-align: center;
}

/* =============================================
   Scroll Reveal Animation
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--reveal-duration) ease, transform var(--reveal-duration) ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
  .nav-overlay > menu {
    animation: none;
  }
}

/* =============================================
   Hover Micro-interactions
   ============================================= */
.nav-overlay > menu > li > a,
.footer-nav-list li a,
.aside-nav li a {
  position: relative;
  overflow: hidden;
}

/* =============================================
   Responsive — Tablet (≤1024px)
   ============================================= */
@media (max-width: 1024px) {
  .header-inner {
    grid-template-columns: 1fr auto auto;
    gap: 8px;
  }

  .nav-left {
    display: none;
  }

  .nav-right ul {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .content-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .sidebar-left {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .aside-inner {
    display: contents;
  }

  .aside-title,
  .aside-tagline {
    display: none;
  }

  .aside-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    grid-column: 1 / -1;
    padding: 16px;
    border: 1px solid var(--c-line);
  }

  .aside-nav li a {
    border-bottom: none;
    border: 1px solid var(--c-line);
    border-radius: 4px;
    padding: 8px 14px;
    min-height: 40px;
    font-size: 0.82rem;
  }

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

  .footer-col-contact {
    grid-column: 1 / -1;
  }
}

/* =============================================
   Responsive — Mobile (≤768px)
   ============================================= */
@media (max-width: 768px) {
  :root {
    --nav-h: 60px;
  }

  .hero-text-layer {
    padding: 60px 24px 100px;
    align-items: flex-end;
  }

  .hero-h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .wrap {
    padding: 0 16px;
  }

  .content-section {
    padding: 48px 0 64px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 16px 32px;
  }

  .footer-bottom {
    padding: 20px 16px;
  }

  .footer-bottom-nav {
    display: none;
  }
}

/* =============================================
   Responsive — Small Mobile (≤480px)
   ============================================= */
@media (max-width: 480px) {
  .hero-text-layer {
    align-items: center;
    text-align: center;
    padding: 48px 20px 90px;
  }

  .hero-eyebrow {
    font-size: 0.65rem;
  }

  .hero-desc {
    display: none;
  }

  .article-content h2 {
    font-size: 1.5rem;
  }

  .nav-overlay > summary {
    top: 10px;
    right: 12px;
  }

  .sub-row {
    flex-direction: column;
    height: auto;
  }

  .sub-input {
    border-right: 1px solid var(--c-line);
    border-bottom: none;
  }

  .sub-btn {
    height: 44px;
  }
}

/* =============================================
   Print
   ============================================= */
@media print {
  .site-header,
  .sidebar-left,
  .nav-overlay,
  .hero-cta,
  .subscribe-form,
  .site-footer {
    display: none !important;
  }

  .content-section {
    grid-template-columns: 1fr;
  }

  body {
    background: white;
    color: black;
  }
}