theme0.css

/* 高级赛博朋克科技风格 */
/* 字体已在 HTML <head> 中通过 <link> 加载，避免 @import 串行延迟 */

/* ============================================================
   CSS 变量 — 换颜色只需改这里
   ============================================================ */
:root {
  --neon-blue:   #00F0FF;
  --neon-purple: #B026FF;
  --neon-green:  #00FF88;
  --neon-orange: #FF9E00;
  --dark-bg:     #080817;
  --grid-line:   rgba(0, 240, 255, 0.1);
  --text-main:   #E0E0FF;
  --text-dim:    rgba(224, 224, 255, 0.6);
}

/* ============================================================
   命名规范
   ——————————————————————————————————————————
   本项目采用 BEM 命名，结构为：

     项目前缀-块名__元素名--修饰符
     ──────── ──── ────── ──────
           Block__Element--Modifier

   - 项目前缀      ARKFUTURE 缩写，防止与第三方 CSS 冲突
   - 块名      多词用连字符  site-header / about-section / net-section
   - 元素      双下划线连接  __title / __heading / __body
   - 修饰符    双连字符连接  --active / --theme-xmas

   通用样式：同类元素（所有区块的 heading / subheading / body 等）
   用显式多选择器合并声明，不用属性选择器（避免误匹配第三方组件）。
   ============================================================ */

/* ============================================================
   全局 / body
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: 'Rajdhani', sans-serif;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(0, 240, 255, 0.05) 0%, transparent 40%),
    radial-gradient(ellipse at 80% 70%, rgba(176, 38, 255, 0.05) 0%, transparent 40%),
    linear-gradient(to bottom, #080817, #0a0a1f),
    repeating-linear-gradient(0deg, var(--grid-line) 0px, var(--grid-line) 1px, transparent 1px, transparent 40px),
    repeating-linear-gradient(90deg, var(--grid-line) 0px, var(--grid-line) 1px, transparent 1px, transparent 40px);
  background-attachment: fixed;
  color: var(--text-main);
  line-height: 1.6;
  font-size: 1rem;
  margin: 0;
  padding: 20px;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    radial-gradient(circle at 50% 50%, rgba(0, 240, 255, 0.02) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent 0px, transparent 2px, rgba(0, 240, 255, 0.02) 2px, rgba(0, 240, 255, 0.02) 4px);
  background-size: 4px 4px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   顶部导航栏 — site-header
   ============================================================ */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  gap: 0.5rem;
}

/* 主题切换按钮组 */
.site-header__theme-switcher {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.site-header__theme-btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 2px;
  color: var(--neon-blue);
  background: transparent;
  border: 1px solid var(--neon-blue);
  padding: 2px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.25s ease;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.site-header__theme-btn:hover {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  text-shadow: 0 0 6px var(--neon-blue);
}

/* 当前激活的主题按钮 */
.site-header__theme-btn--active {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  background: rgba(0, 240, 255, 0.08);
  text-shadow: 0 0 6px var(--neon-blue);
}

/* 语言切换按钮 */
.site-header__lang-btn {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--text-dim);
  border: 1px solid var(--text-dim);
  padding: 2px 10px;
  border-radius: 8px;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.site-header__lang-btn:hover {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  text-shadow: 0 0 6px var(--neon-blue);
}

.site-header__lang-btn::after { display: none; }

/* ============================================================
   Hero 主标题区 — hero
   ============================================================ */
.hero {
  text-align: center;
  padding: 1.5rem 0 1rem;
}

.hero__title {
  font-size: 300%;
  font-weight: 700;
  font-family: 'Orbitron', sans-serif;
  text-transform: uppercase;
  letter-spacing: 4px;
  /* 字色降饱和度压亮度，不再是纯霓虹青 */
  color: rgba(0, 200, 220, 0.78);
  position: relative;
  margin: 1.5rem 0;
  z-index: 1;
  text-shadow:
    0 0 4px  #fff,
    0 0 10px var(--neon-blue),
    0 0 20px var(--neon-blue),
    0 0 35px var(--neon-purple),
    0 0 55px var(--neon-purple);
  animation: neon-flicker 3.5s infinite;
}

/* 霓虹闪烁：模拟真实霓虹灯亮暗跳变，大部分时间亮，偶尔快速暗一下 */
@keyframes neon-flicker {
  0%   { opacity: 1; }
  4%   { opacity: 0.85; }
  5%   { opacity: 1; }
  7%   { opacity: 0.7; }
  8%   { opacity: 1; }
  45%  { opacity: 1; }
  46%  { opacity: 0.9; }
  47%  { opacity: 1; }
  90%  { opacity: 1; }
  91%  { opacity: 0.75; }
  92%  { opacity: 0.95; }
  93%  { opacity: 0.6; }
  94%  { opacity: 1; }
  100% { opacity: 1; }
}

/* glitch 错位层：偶尔出现，强调动感 */
.hero__title::before {
  content: "ARKFUTURE";
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0, 240, 255, 0.5);
  text-stroke: 1px rgba(0, 240, 255, 0.5);
  z-index: -1;
  animation: glitch-before 4s infinite alternate;
}

.hero__title::after {
  content: "ARKFUTURE";
  position: absolute;
  top: 2px; left: 2px;
  width: 100%;
  color: transparent;
  -webkit-text-stroke: 1px rgba(176, 38, 255, 0.4);
  text-stroke: 1px rgba(176, 38, 255, 0.4);
  z-index: -2;
  opacity: 0.7;
  animation: glitch-after 4s infinite alternate-reverse;
}

/* ============================================================
   main
   ============================================================ */
main {
  max-width: 900px;
  margin: 0 auto;
}

/* ============================================================
   区块通用样式
   ——————————————————————————————————————————
   每个区块（about / net / licenses / ending）是独立的 BEM Block。
   同类元素用显式多选择器合并声明，保留按块定制的灵活性。
   如需定制某区块，直接追加该块的专属规则即可。
   ============================================================ */

/* 区块间距 */
.about,
.net,
.licenses,
.ending {
  margin: 2rem 0;
}

/* 分隔线 */
.divider {
  border: none;
  border-top: 1px solid var(--grid-line);
  margin: 2rem 0;
}

/* ——— 主标题 h1 ——— */
.about__heading,
.net__heading,
.licenses__heading,
.ending__heading {
  font-size: 1.6rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 500;
  letter-spacing: 1px;
  margin: 1.2rem 0;
  color: var(--neon-blue);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  padding-bottom: 0.4rem;
}

/* ——— 二级标题 h2 ——— */
.about__subheading,
.net__subheading,
.licenses__subheading,
.ending__subheading {
  font-size: 1.3rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 500;
  letter-spacing: 1px;
  margin: 1.2rem 0;
  color: var(--neon-purple);
  text-shadow: 0 0 6px rgba(176, 38, 255, 0.3);
}

/* ——— 三级标签 h3 ——— */
.net__label {
  font-size: 1rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 500;
  letter-spacing: 1px;
  margin: 0.8rem 0 0.3rem;
  color: var(--neon-blue);
}

/* ——— 内容面板 ——— */
.about__body,
.net__body,
.licenses__body,
.ending__body {
  background: rgba(20, 20, 48, 0.75);
  padding: 1.2rem 1.5rem;
  margin: 1rem 0;
  border-radius: 8px;
}

/* ============================================================
   about 区块
   ============================================================ */

/* 无额外样式，继承通用规则 */

/* ============================================================
   net 区块 — 小组件
   ============================================================ */
.net__widget {
  display: block;
  border: none;
  width: 400px;
  height: 200px;
  margin: 8px 0;
}

/* ============================================================
   ending 区块
   ============================================================ */

/* 引用块 */
.ending__quote {
  margin: 1.2rem 0 1.2rem 0;
  padding: 0.8rem 1.2rem 0.8rem 1.4rem;
  background: rgba(0, 240, 255, 0.04);
  border-left: 2px solid rgba(0, 240, 255, 0.35);
  color: rgba(224, 224, 255, 0.8);
  font-style: italic;
  border-radius: 0 6px 6px 0;
}

.ending__quote cite {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--neon-blue);
  font-style: normal;
  opacity: 0.7;
}

/* 系统列表 */
.ending__systems {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 2;
}

/* ============================================================
   链接
   ============================================================ */
a {
  color: var(--neon-green);
  text-decoration: none;
  font-weight: 600;
  position: relative;
  transition: all 0.3s ease;
}

a:hover {
  color: var(--neon-orange);
}

a::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -2px; left: 0;
  background: linear-gradient(90deg, var(--neon-green), var(--neon-purple));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}

a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ============================================================
   footer — site-footer
   ============================================================ */
.site-footer {
  margin-top: 3rem;
  padding: 2rem 0;
  position: relative;
  background: rgba(8, 8, 23, 0.7);
  border-top: 1px solid transparent;
  border-image: linear-gradient(90deg,
    transparent,
    var(--neon-blue),
    var(--neon-purple),
    transparent) 1;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.9rem;
  color: var(--neon-blue);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--neon-green),
    transparent);
  animation: scan 3s linear infinite;
}

.site-footer__inner {
  text-align: center;
}

.site-footer a {
  color: var(--neon-purple);
  margin: 0 0.5rem;
}

.site-footer a:hover {
  color: var(--neon-orange);
  text-shadow: 0 0 8px var(--neon-orange);
}

/* 联系按钮 */
.site-footer__contact {
  display: inline-block;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
  color: var(--text-dim);
  border: 1px solid var(--text-dim);
  padding: 2px 10px;
  border-radius: 8px;
  margin-top: 0.8rem;
  transition: all 0.3s ease;
}

.site-footer__contact:hover {
  color: var(--neon-blue);
  border-color: var(--neon-blue);
  text-shadow: 0 0 6px var(--neon-blue);
}

/* ============================================================
   动画
   ============================================================ */
@keyframes pulse {
  0%, 100% { opacity: 0.95; }
  50%       { opacity: 1; }
}

@keyframes pulse-bg {
  0%   { opacity: 0.8; }
  50%  { opacity: 0.6; }
  100% { opacity: 0.8; }
}

@keyframes glitch {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(-2px, 2px);  text-shadow: 0 0 5px #fff, 0 0 10px var(--neon-blue),   0 0 20px var(--neon-purple), 0 0 30px var(--neon-purple), 0 0 40px var(--neon-orange); }
  40% { transform: translate(2px, -2px);  text-shadow: 0 0 5px #fff, 0 0 10px var(--neon-purple), 0 0 20px var(--neon-blue),   0 0 30px var(--neon-orange), 0 0 40px var(--neon-purple); }
  60% { transform: translate(-2px, -2px); }
  80% { transform: translate(2px, 2px); }
}

@keyframes glitch-before {
  0%, 100% { transform: translate(0); }
  25% { transform: translate(-3px,  3px); }
  50% { transform: translate( 3px, -3px); }
  75% { transform: translate(-3px, -3px); }
}

@keyframes glitch-after {
  0%, 100% { transform: translate(1px,  1px); opacity: 0.7; }
  50%       { transform: translate(-1px, -1px); opacity: 0.4; }
}

@keyframes scan {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(100%); }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  body {
    padding: 12px;
    font-size: 0.95rem;
  }
  .hero__title {
    font-size: 200%;
    letter-spacing: 2px;
  }
  .about__heading,
  .net__heading,
  .licenses__heading,
  .ending__heading {
    font-size: 1.3rem;
  }
  .about__subheading,
  .net__subheading,
  .licenses__subheading,
  .ending__subheading {
    font-size: 1.1rem;
  }
  .site-footer { font-size: 0.8rem; }
  .about__body,
  .net__body,
  .licenses__body,
  .ending__body {
    padding: 1rem;
  }
  /* 手机端 IRC iframe 防溢出 */
  .net__widget {
    max-width: 100% !important;
    width: 100% !important;
  }
}

/* ============================================================
   友情链接区块 — friends
   ============================================================ */
.friends {
  margin: 2rem 0;
}

.friends__heading {
  font-size: 1.6rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 500;
  letter-spacing: 1px;
  margin: 1.2rem 0;
  color: var(--neon-blue);
  text-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  padding-bottom: 0.4rem;
}

.friends__body {
  background: rgba(20, 20, 48, 0.75);
  padding: 1.2rem 1.5rem;
  margin: 1rem 0;
  border-radius: 8px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
}

/* 友链按钮（a 标签） */
.friends__link {
  display: inline-block;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 1px;
  color: var(--neon-blue);
  border: 1px solid var(--neon-blue);
  padding: 6px 16px;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.friends__link:hover {
  color: var(--neon-green);
  border-color: var(--neon-green);
  text-shadow: 0 0 6px var(--neon-green);
}

/* 按钮形态不显示全局 a::after 下划线动画 */
.friends__link::after,
.friends__badge::after {
  display: none;
}

/* 88x31 图片按钮（img 标签） */
.friends__badge {
  display: inline-block;
  line-height: 0;
}

.friends__badge img {
  width: 88px;
  height: 31px;
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 4px;
  transition: all 0.3s ease;
}

.friends__badge:hover img {
  border-color: var(--neon-blue);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

@media (max-width: 768px) {
  .friends__heading {
    font-size: 1.3rem;
  }
  .friends__body {
    padding: 1rem;
  }
}