/* ==========================================================================
   Debian 中文社区 — index.css
   首页：问候 / Debian 老黄历 / 社区入口 / 新鲜事 / 安全公告 / 初识 Debian /
         Hello / 联系我们
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 分区
   -------------------------------------------------------------------------- */
.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
  border-top: 1px solid var(--rule);
}

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
}

.section-head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
  letter-spacing: 0.01em;
}

.section-head p {
  margin-top: 0.5rem;
  color: var(--ink-2);
}

.more-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 1.25rem;
  font-size: 0.9rem;
}

.more-links a::after {
  content: " →";
}

/* --------------------------------------------------------------------------
   2. 首屏
   -------------------------------------------------------------------------- */
.hero {
  padding-block: clamp(2.75rem, 7vw, 5.5rem) clamp(3.5rem, 8vw, 6.5rem);
}

.hero-inner {
  width: min(var(--container), 100% - 2 * var(--gutter));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 23rem);
  gap: clamp(2.5rem, 7vw, 6rem);
  align-items: center;
}

.hero-title {
  font-size: clamp(3.4rem, 9vw, 6.75rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

/* 文楷的西文偏小，略微放大让中西文视觉等高 */
.hero-title [lang="en"] {
  font-size: 1.06em;
}

/* 全角逗号自带的右侧空白在大字号下太宽，收紧一些 */
.hero-comma {
  margin-right: -0.32em;
}

.hero-lead {
  max-width: 31em;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  line-height: 1.85;
}

.hero-hello {
  max-width: 34em;
  margin-top: 0.9rem;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.6;
}

.hero-hello a {
  white-space: nowrap;
}

.hero-hello a::after {
  content: " ↓";
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.75rem, 3.5vw, 2.5rem);
}

.hero-release {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 1.25rem;
  color: var(--ink-3);
  font-size: 0.85rem;
}

/* 绿色小点：表示「当前受支持的版本」 */
.hero-release::before {
  content: "";
  flex-shrink: 0;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--qing);
  box-shadow: 0 0 0 4px var(--qing-wash);
}

/* --------------------------------------------------------------------------
   3. Debian 老黄历（撕页日历）
   -------------------------------------------------------------------------- */
.almanac {
  position: relative;
  width: 100%;
  max-width: 23rem;
  justify-self: end;
}

.almanac-pad {
  position: relative;
  isolation: isolate;
  padding-top: 14px;
}

/* 装订条：撕页时它留在原处 */
.almanac-binding {
  position: absolute;
  top: 0;
  left: -6px;
  right: -6px;
  z-index: 4;
  height: 20px;
  border-radius: 5px 5px 2px 2px;
  background: var(--debian);
  box-shadow: 0 3px 6px -3px rgba(80, 0, 25, 0.5);
}

/* 底下还有好几页 */
.almanac-pad::before,
.almanac-pad::after {
  content: "";
  position: absolute;
  inset: 14px 0 0;
  z-index: -1;
  border: 1px solid var(--rule);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--surface);
}

.almanac-pad::before {
  transform: translate(7px, 9px) rotate(1.4deg);
  opacity: 0.6;
}

.almanac-pad::after {
  transform: translate(3px, 4px) rotate(0.6deg);
}

.almanac-page {
  position: relative;
  z-index: 1;
  padding: 1.6rem 1.5rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-paper);
}

/* 撕线：一排小孔 */
.almanac-page::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 0.75rem;
  right: 0.75rem;
  height: 4px;
  background: radial-gradient(circle, var(--paper) 1.5px, transparent 2px) 0 0 / 9px 4px repeat-x;
  opacity: 0.9;
}

.almanac-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.almanac-title {
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}

.almanac-ym {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.almanac-date {
  display: grid;
  justify-items: center;
  margin-block: 0.25rem 1.1rem;
  text-align: center;
}

.almanac-day {
  display: block;
  color: var(--debian);
  font-family: var(--font-display);
  font-size: clamp(6rem, 16vw, 7.75rem);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.almanac-sub {
  font-family: var(--font-display);
  color: var(--ink-2);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.almanac-lunar:not(:empty)::before {
  content: "·";
  margin-inline: 0.5em;
  color: var(--ink-3);
}

.almanac-luck {
  border-top: 3px double var(--rule-strong);
}

.almanac-row {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding-block: 0.85rem;
}

.almanac-row + .almanac-row {
  border-top: 1px dashed var(--rule-strong);
}

.almanac-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1;
}

.almanac-yi .almanac-mark {
  background: var(--qing);
}

.almanac-ji .almanac-mark {
  background: var(--debian);
}

:root[data-theme="dark"] .almanac-mark {
  color: #0b0e11;
}

.almanac-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
  line-height: 1.55;
}

.almanac-list li + li {
  margin-top: 0.3rem;
}

.almanac-list code,
.almanac-list kbd {
  font-size: 0.85em;
}

.almanac-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--rule);
}

.almanac-note {
  color: var(--ink-3);
  font-size: 0.78rem;
}

/* 白文印：「中文社区」，竖排右起 */
.seal-stamp {
  display: inline-block;
  flex-shrink: 0;
  box-sizing: content-box;
  width: 2.3rem;
  height: 2.3rem;
  padding: 0.3rem;
  border-radius: 3px;
  background: var(--debian);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.12rem;
  line-height: 1.05;
  text-align: center;
  writing-mode: vertical-rl;
  letter-spacing: 0;
  transform: rotate(-7deg);
  /* 印泥的斑驳感 */
  -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.55' numOctaves='3' seed='11'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -4 0 0 0 3.1'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.55' numOctaves='3' seed='11'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -4 0 0 0 3.1'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  -webkit-mask-size: 120px 120px;
  mask-size: 120px 120px;
}

:root[data-theme="dark"] .seal-stamp {
  color: #0b0e11;
}

.almanac-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem 1rem;
  margin-top: 1.4rem;
}

.almanac-tear,
.almanac-reset {
  padding: 0.35rem 0.25rem;
  border-radius: 4px;
  color: var(--ink-2);
  font-size: 0.9rem;
  text-decoration: underline;
  text-decoration-color: var(--rule-strong);
  text-underline-offset: 0.3em;
  transition: color var(--fast), text-decoration-color var(--fast);
}

.almanac-tear::after {
  content: " ↗";
}

.almanac-tear:hover,
.almanac-reset:hover {
  color: var(--debian-ink);
  text-decoration-color: currentColor;
}

/* 撕下的那一页：由 home.js 复制一份，盖在新页上方飞走 */
.almanac-page.is-torn {
  position: absolute;
  top: 14px;
  left: 0;
  right: 0;
  z-index: 3;
  pointer-events: none;
  transform-origin: 6% 0;
  animation: almanac-tear 620ms cubic-bezier(0.5, 0, 0.75, 0) forwards;
}

@keyframes almanac-tear {
  0% {
    transform: none;
    opacity: 1;
  }

  25% {
    transform: rotate(-2.5deg) translateY(2px);
    opacity: 1;
  }

  100% {
    transform: translate(-3rem, -5rem) rotate(-16deg);
    opacity: 0;
  }
}

/* --------------------------------------------------------------------------
   4. 社区入口：朱文印字牌，悬停时变为白文印
   -------------------------------------------------------------------------- */
.door-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.door {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 1.4rem 1.25rem 1.35rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: transform var(--base), border-color var(--base), box-shadow var(--base);
}

.door:hover {
  border-color: color-mix(in srgb, var(--debian) 55%, var(--rule));
  box-shadow: var(--shadow-lift);
  color: var(--ink);
  transform: translateY(-3px);
}

.glyph {
  display: grid;
  place-items: center;
  width: 3.3rem;
  height: 3.3rem;
  margin-bottom: 1.15rem;
  border: 2px solid var(--debian);
  border-radius: 5px;
  outline: 1px solid color-mix(in srgb, var(--debian) 35%, transparent);
  outline-offset: 3px;
  color: var(--debian);
  font-family: var(--font-display);
  font-size: 1.95rem;
  line-height: 1;
  transition: background var(--base), color var(--base), transform var(--base);
}

.door:hover .glyph {
  background: var(--debian);
  color: #fff;
  transform: rotate(-5deg);
}

:root[data-theme="dark"] .door:hover .glyph {
  color: #0b0e11;
}

.door-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.3;
}

.door-host {
  margin-top: 0.15rem;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  overflow-wrap: anywhere;
}

.door-desc {
  margin-top: 0.75rem;
  color: var(--ink-2);
  font-size: 0.93rem;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   5. 新鲜事（时间线）与安全公告
   -------------------------------------------------------------------------- */
.updates-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: start;
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 6.6rem minmax(0, 1fr) auto;
  gap: 0.4rem 1.25rem;
  align-items: baseline;
  padding-block: 1rem;
  border-bottom: 1px solid var(--rule);
}

.timeline-date {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.timeline-title {
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.55;
  text-decoration: none;
}

/* 整行可点 */
.timeline-title::after {
  content: "";
  position: absolute;
  inset: 0;
}

.timeline-item:hover .timeline-title {
  color: var(--debian-ink);
}

.source {
  padding: 0.05rem 0.55rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 0.75rem;
  white-space: nowrap;
}

.source-debian {
  border-color: color-mix(in srgb, var(--debian-ink) 45%, transparent);
  color: var(--debian-ink);
}

.security {
  padding: clamp(1.4rem, 3vw, 1.9rem);
  border: 1px solid var(--rule);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.security .section-head {
  margin-bottom: 1.25rem;
}

.security .section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 1.9rem);
}

.dsa-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.dsa {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-block: 0.6rem;
  border-top: 1px solid var(--rule);
}

.dsa-link {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.1rem 0.6rem;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.dsa-link::after {
  content: "";
  position: absolute;
  inset: 0;
}

.dsa-pkg {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.dsa:hover .dsa-pkg {
  color: var(--debian-ink);
}

.dsa-id,
.dsa-date {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.dsa-kind {
  padding: 0 0.4rem;
  border-radius: 4px;
  background: var(--debian-wash);
  color: var(--debian-ink);
  font-size: 0.72rem;
}

.cmd {
  margin-top: 1.25rem;
}

.cmd-label {
  margin-bottom: 0.45rem;
  color: var(--ink-2);
  font-size: 0.88rem;
}

.cmd-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.55rem 0.55rem 1rem;
  border-radius: var(--radius);
  background: var(--night);
  color: var(--night-ink);
}

:root[data-theme="dark"] .cmd-box {
  border: 1px solid var(--rule);
}

.cmd-box pre {
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.6;
  scrollbar-width: thin;
}

.cmd-box pre::before {
  content: "$ ";
  color: var(--night-accent);
}

.cmd-box code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.cmd-copy {
  flex-shrink: 0;
  min-width: 4.2em;
  padding: 0.3rem 0.75rem;
  border: 1px solid rgba(238, 242, 241, 0.25);
  border-radius: 999px;
  color: var(--night-ink);
  font-size: 0.8rem;
  transition: background var(--fast), border-color var(--fast);
}

.cmd-copy:hover {
  border-color: rgba(238, 242, 241, 0.6);
  background: rgba(238, 242, 241, 0.08);
}

.cmd-copy.is-done {
  border-color: transparent;
  background: var(--qing);
  color: #fff;
}

/* --------------------------------------------------------------------------
   6. 初识 Debian 与新手上路
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(2.5rem, 7vw, 6rem);
  align-items: start;
}

.about-text h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(1.9rem, 3.6vw, 2.6rem);
}

.about-text p {
  max-width: 36em;
}

.about-text p + p {
  margin-top: 1em;
}

.starter-title {
  margin-bottom: 0.75rem;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
}

.starter-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink);
}

.starter-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 1rem;
  padding-block: 0.8rem;
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  text-decoration: none;
}

.starter-list strong {
  font-weight: 600;
}

.starter-list span {
  grid-column: 1;
  color: var(--ink-2);
  font-size: 0.88rem;
}

.starter-list a::after {
  content: "→";
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  color: var(--ink-3);
  transition: transform var(--fast), color var(--fast);
}

.starter-list a:hover strong,
.starter-list a:hover::after {
  color: var(--debian-ink);
}

.starter-list a:hover::after {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   7. Hello：致更广大的 Debian 社区
   -------------------------------------------------------------------------- */
.hello {
  position: relative;
  overflow: hidden;
  border-top: 0;
  background: var(--hello-bg);
  color: var(--night-ink);
}

/* Debian 漩涡，作为水印 */
.hello::after {
  content: "";
  position: absolute;
  top: 50%;
  right: max(-8rem, calc((100vw - var(--container)) / 2 - 10rem));
  width: clamp(20rem, 38vw, 32rem);
  aspect-ratio: 87 / 108;
  background: url("../images/swirl.svg") no-repeat center / contain;
  opacity: 0.16;
  transform: translateY(-50%) rotate(-10deg);
  pointer-events: none;
}

.hello-inner {
  position: relative;
  z-index: 1;
}

.hello-kicker {
  color: var(--night-accent);
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.06em;
}

.hello-title {
  max-width: 17em;
  margin-top: 0.75rem;
  color: var(--night-ink);
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.12;
}

.hello-lead {
  max-width: 34em;
  margin-top: 1.25rem;
  color: var(--night-ink-2);
  font-size: clamp(1.02rem, 1.4vw, 1.15rem);
  line-height: 1.7;
}

.hello-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  gap: 0.6rem 2.5rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.hello-links a {
  color: var(--night-ink);
  text-decoration-color: color-mix(in srgb, var(--night-accent) 50%, transparent);
}

.hello-links a:hover {
  color: var(--night-accent);
}

.hello-links a::before {
  content: "→ ";
  color: var(--night-accent);
}

.nowrap {
  white-space: nowrap;
}

.hello code {
  background: rgba(238, 242, 241, 0.1);
}

.hello :focus-visible {
  outline-color: var(--night-accent);
}

/* --------------------------------------------------------------------------
   8. 联系我们
   -------------------------------------------------------------------------- */
.contact {
  border-top: 0;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.contact-list li {
  padding-top: 1rem;
  border-top: 2px solid var(--ink);
}

.contact-list h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
}

.contact-list p {
  margin-top: 0.4rem;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   9. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  /* 五个入口：上三下二 */
  .door-list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .door-list > li {
    grid-column: span 2;
  }

  .door-list > li:nth-child(n + 4) {
    grid-column: span 3;
  }

  .contact-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .hero-inner,
  .updates-grid,
  .about-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .almanac {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  .door-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.75rem;
  }

  .door-list > li,
  .door-list > li:nth-child(n + 4) {
    grid-column: auto;
  }

  .door {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 1rem;
    padding: 1rem;
  }

  .glyph {
    grid-row: 1 / span 3;
    width: 2.9rem;
    height: 2.9rem;
    margin: 0.2rem 0 0;
    font-size: 1.7rem;
  }

  .door-name {
    font-size: 1.2rem;
  }

  .door-desc {
    margin-top: 0.3rem;
  }

  .timeline-item {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .timeline-title {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .hello-links,
  .contact-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-actions .button {
    flex: 1 1 auto;
  }

  .cmd-box pre {
    white-space: pre-wrap;
  }
}