/* ===== 主题颜色与全局变量 ===== */
/* 昼夜模式会通过 body 上的 data-theme 属性切换颜色；背景图可在此处替换。 */
:root {
  color-scheme: dark;
  --page-text: #f5f4ef;
  --muted-text: rgba(245, 244, 239, 0.66);
  --accent: #c4f06d;
  --panel-bg: rgba(15, 20, 20, 0.64);
  --panel-text: #f0f1ec;
  --panel-muted: #a4aea7;
  --panel-border: rgba(240, 241, 236, 0.14);
  --panel-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
  /* 桌面使用宽幅原创山谷图，手机端会在下方媒体查询切换成竖幅构图。 */
  --background-image: url("images/background-desktop.svg");
  --mobile-background-image: url("images/background-mobile.svg");
  --page-background: #17232c;
}

body[data-theme="day"] {
  color-scheme: light;
  --page-text: #142019;
  --muted-text: #26382c;
  --accent: #355d12;
  --panel-bg: rgba(255, 255, 252, 0.7);
  --panel-text: #17211f;
  --panel-muted: #4a554d;
  --panel-border: rgba(27, 38, 34, 0.18);
  --panel-shadow: 0 24px 80px rgba(50, 62, 48, 0.14);
  --page-background: #e7ece4;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  background: var(--page-background);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--page-text);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--page-background);
  transition: color 300ms ease, background-color 300ms ease;
}

/* 账号页打开时只允许覆盖面板滚动，避免底下首页再出现第二条滚动条。 */
body.account-page-open {
  overflow: hidden;
}

button,
a {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.site-shell {
  position: relative;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  isolation: isolate;
  overflow-x: clip;
  background-color: transparent;
}

/* ===== 页面背景与主题按钮 ===== */
/* 背景装饰层不会阻挡交互；图片和渐变可以按需替换。 */
.background-decoration {
  position: fixed;
  z-index: 0;
  inset: 0;
  overflow: hidden;
  background: linear-gradient(150deg, #25363c 0%, #14212a 55%, #263a38 100%);
}

/* 首页及账号页共用七张原创风景，每张停留一分钟后再缓慢交替。 */
.background-scene {
  position: absolute;
  inset: 0;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  opacity: 0;
  pointer-events: none;
  transition: opacity 2200ms ease-in-out;
}

.background-scene.is-active {
  opacity: 1;
}

.scene-mountain {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.22), rgba(31, 48, 52, 0.16)),
    url("images/background-desktop.svg");
}

.scene-forest {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.2), rgba(31, 48, 52, 0.14)),
    url("images/background-forest.svg");
}

.scene-coast {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.18), rgba(31, 48, 52, 0.12)),
    url("images/background-coast.svg");
}

.scene-aurora {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.18), rgba(31, 48, 52, 0.12)),
    url("images/background-aurora.svg");
}

.scene-sakura {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.16), rgba(31, 48, 52, 0.1)),
    url("images/background-sakura.svg");
}

.scene-lake {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.18), rgba(31, 48, 52, 0.12)),
    url("images/background-lake.svg");
}

.scene-desert {
  background-image:
    linear-gradient(135deg, rgba(14, 25, 34, 0.18), rgba(31, 48, 52, 0.12)),
    url("images/background-desert.svg");
}

body[data-theme="day"] .background-decoration {
  background: linear-gradient(150deg, #dce8df 0%, #d7e2e8 55%, #e0eadf 100%);
}

body[data-theme="day"] .background-scene {
  filter: brightness(1.14) saturate(0.9);
}

.theme-toggle {
  position: absolute;
  z-index: 3;
  top: 28px;
  right: max(28px, calc((100vw - 1120px) / 2));
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 9px;
  padding: 0 15px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  color: var(--page-text);
  background: rgba(20, 30, 34, 0.2);
  backdrop-filter: blur(12px);
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  background: rgba(20, 30, 34, 0.38);
}

body[data-theme="day"] .theme-toggle {
  border-color: rgba(20, 32, 24, 0.32);
  color: #142019;
  background: rgba(255, 255, 255, 0.82);
}

body[data-theme="day"] .theme-toggle:hover {
  background: #fff;
}

.theme-icon {
  font-size: 19px;
  line-height: 1;
}

.theme-label {
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* ===== 首页欢迎区与动态文字 ===== */
/* 标题与动态小字居中；欢迎区稍微加高，让动态文字与下方底板留出距离。 */
.hero {
  position: relative;
  z-index: 1;
  position: relative;
  display: flex;
  min-height: 28vh;
  flex: 0 0 28vh;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 74px 24px 34px;
  text-align: center;
}

.eyebrow,
.section-kicker,
.nav-card-number {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
}

.hero h1 {
  max-width: 100%;
  margin: 0;
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 650;
  letter-spacing: 0.045em;
  line-height: 1.35;
  text-wrap: balance;
}

.typing-line {
  display: flex;
  width: 100%;
  min-height: 26px;
  align-items: center;
  justify-content: center;
  margin: 10px 0 0;
  color: var(--muted-text);
  font-size: clamp(14px, 1.8vw, 17px);
  letter-spacing: 0.13em;
  font-family: KaiTi, "楷体", STKaiti, "华文楷体", serif;
}

/* 白昼背景较亮时加深动态格言文字，避免与背景融在一起。 */
body[data-theme="day"] .typing-line {
  color: #17251b;
}

.typing-cursor {
  display: inline-block;
  width: 1px;
  height: 1.15em;
  margin-left: 5px;
  background: var(--accent);
  animation: blink 0.8s steps(2, start) infinite;
}

/* ===== 首页个人资料与导航底板 ===== */
/* 首页和账号子页面都使用半透明面板，颜色由主题变量统一控制。 */
.content-panel {
  position: relative;
  z-index: 1;
  width: min(100% - 48px, 1080px);
  /* 留出一点真实的页面滚动距离，桌面端也可以自然向下滑到个人信息区。 */
  min-height: 82vh;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 58px) clamp(24px, 7vw, 82px) 25px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-bottom: 0;
  border-radius: 24px 24px 0 0;
  color: var(--panel-text);
  background: var(--panel-bg);
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(7px);
  transition: background-color 300ms ease, color 300ms ease, box-shadow 300ms ease;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding-bottom: 23px;
  border-bottom: 1px solid var(--panel-border);
}

.section-kicker {
  margin: 0 0 8px;
  color: var(--panel-muted);
}

.panel-heading h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: 0.04em;
}

.panel-mark {
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 29px;
  font-style: italic;
}

.profile-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 54px;
  padding: 30px 0 34px;
}

.profile-list p {
  display: flex;
  min-width: 120px;
  gap: 14px;
  margin: 0;
  font-size: 16px;
}

.profile-label {
  color: var(--panel-muted);
}

.main-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.nav-card {
  display: flex;
  min-height: 150px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 23px 25px;
  border: 1px solid var(--panel-border);
  border-radius: 15px;
  color: var(--panel-text);
  background: rgba(255, 255, 255, 0.24);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: transform 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.nav-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 65%, transparent);
  background: rgba(255, 255, 255, 0.55);
}

.nav-card-number {
  color: var(--panel-muted);
}

.nav-card-title {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 24px;
  font-weight: 650;
}

.nav-card-title span {
  color: var(--accent);
  transition: transform 180ms ease;
}

.nav-card:hover .nav-card-title span {
  transform: translateX(4px);
}

.nav-card-description {
  margin-top: 8px;
  color: var(--panel-muted);
  font-size: 13px;
}

.panel-footer {
  display: flex;
  justify-content: space-between;
  margin: 27px 0 0;
  color: var(--panel-muted);
  font-size: 12px;
}

/* ===== 账号子页面与卡片细节 ===== */
[hidden] {
  display: none !important;
}

.detail-panel {
  position: fixed;
  z-index: 2;
  inset: 0;
  width: 100%;
  min-height: 100vh;
  margin: 0;
  overflow-y: auto;
  border: 0;
  border-radius: 0;
  animation: panel-slide-in 520ms cubic-bezier(0.22, 0.75, 0.25, 1) both;
  background: var(--panel-bg);
  backdrop-filter: blur(2px);
}

/* 打开账号页时只隐藏首页内容，不隐藏固定背景和昼夜切换按钮。 */
body.account-page-open .hero,
body.account-page-open #home-panel {
  visibility: hidden;
}

/* 账号页覆盖整个视口；主题按钮固定在视口上方，不受首页滚动位置影响。 */
body.account-page-open .theme-toggle {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 0;
  border: 0;
  color: var(--panel-muted);
  background: none;
  font-size: 14px;
  cursor: pointer;
  transition: color 180ms ease;
}

.back-button:hover {
  color: var(--panel-text);
}

.back-button span {
  font-size: 18px;
}

.detail-content {
  max-width: 760px;
  margin: clamp(48px, 10vh, 96px) auto 0;
  animation: content-enter 500ms 80ms ease both;
}

.detail-kicker {
  margin: 0 0 10px;
  color: var(--panel-muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.detail-title {
  margin: 0;
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: 0.04em;
}

.detail-intro {
  max-width: 620px;
  margin: 18px 0 42px;
  color: var(--panel-muted);
  font-size: 15px;
  line-height: 2;
}

.account-list,
.note-list {
  display: grid;
  gap: 18px;
}

.account-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 23px 24px;
  border: 1px solid var(--panel-border);
  border-radius: 13px;
  color: var(--panel-text);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.account-link:hover {
  transform: translateX(4px);
  border-color: color-mix(in srgb, var(--accent) 65%, transparent);
  background: rgba(255, 255, 255, 0.42);
}

.account-name {
  font-weight: 600;
}

.account-url {
  color: var(--panel-muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.account-arrow {
  flex: 0 0 auto;
  color: var(--accent);
}

.note-card {
  padding: 26px 28px;
  border: 1px solid var(--panel-border);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.2);
}

.note-date {
  margin: 0 0 9px;
  color: var(--panel-muted);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.note-title {
  margin: 0;
  font-size: 18px;
}

.note-body {
  margin: 10px 0 0;
  color: var(--panel-muted);
  font-size: 14px;
  line-height: 1.85;
}

/* ===== 页面动效、手机布局与减少动态效果设置 ===== */
@keyframes blink {
  to { visibility: hidden; }
}

@keyframes panel-enter {
  from { opacity: 0; transform: translateY(12px) scale(0.99); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes panel-slide-in {
  from { opacity: 0; transform: translateX(48px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes home-slide-in {
  from { opacity: 0; transform: translateX(-24px); }
  to { opacity: 1; transform: translateX(0); }
}

.home-return {
  animation: home-slide-in 420ms cubic-bezier(0.22, 0.75, 0.25, 1) both;
}

@keyframes content-enter {
  from { opacity: 0; transform: translateY(9px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-height: 950px) {
  .content-panel {
    min-height: 82vh;
  }
}

@media (max-width: 600px) {
  /* 手机使用竖版背景，避免桌面横图在窄屏上被过度裁切。 */
  :root {
    --background-image: var(--mobile-background-image);
  }

  .background-scene {
    background-position: center;
  }

  .theme-toggle {
    top: 16px;
    right: 16px;
    min-height: 38px;
    padding: 0 11px;
  }

  .theme-label {
    font-size: 12px;
  }

  .hero {
    min-height: 29vh;
    flex-basis: 29vh;
    padding: 72px 18px 34px;
  }

  .eyebrow {
    font-size: 9px;
  }

  .hero h1 {
    max-width: 430px;
    font-size: clamp(25px, 7vw, 34px);
  }

  .content-panel {
    width: calc(100% - 24px);
    min-height: 80vh;
    padding: 30px 21px 22px;
    border-radius: 20px 20px 0 0;
  }

  .profile-list {
    gap: 14px 25px;
    padding: 25px 0 28px;
  }

  .profile-list p {
    min-width: 95px;
    font-size: 15px;
  }

  .main-navigation {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .nav-card {
    min-height: 130px;
    padding: 20px;
  }

  .panel-footer {
    margin-top: 21px;
  }

  .detail-content {
    margin-top: 52px;
  }

  .detail-panel {
    padding: 26px 21px;
  }

  .account-link {
    align-items: flex-start;
    padding: 20px;
  }

  .account-link > span:first-child {
    display: grid;
    gap: 8px;
  }

  .note-card {
    padding: 22px 20px;
  }

  .detail-intro {
    margin-bottom: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

}