@import url("https://fonts.googleapis.com/css2?family=Rubik:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap");

/* 字体优化：使用 font-display: swap 避免阻塞渲染 */
@font-face {
  font-family: 'Rubik';
  font-display: swap;
  src: local('Rubik');
}

/* ======================================================
                    VARIABLES & GENERAL CSS
========================================================*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  text-decoration: none;
  list-style: none;
  resize: none;
  border: none;
}

/* ======================================================
                跳转导航链接（无障碍）
========================================================*/
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 10000;
  border-radius: 0 0 4px 0;
  font-weight: 500;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ======================================================
                增强焦点指示器（无障碍）
========================================================*/
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

button:focus-visible,
.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

:root {
  /* 慕夏风格：奶油底、柔和蓝绿为主，金/橙仅点缀 */
  --color-bg: #f7f4ef;
  --color-text: #4a5568;
  --color-muted: #5a6c7d; /* 修复对比度：从 #718096 改为 #5a6c7d，对比度从 3.9:1 提升到 5.2:1 (WCAG AA) */
  --color-primary: #6b8e9f;
  --color-primary-soft: #8fa9b5;
  --color-accent: #c9a227;
  --color-accent-hover: #b8921f;
  --color-card: #fffefb;
  --color-border: #e8e4dc;
  --color-white: #ffffff; /* 白色文本，用于深色背景 */

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --inner-shadow: none;

  --width-lg: 80%;
  --width-sm: 95%;
  --transition: all 0.25s ease;

  /* 现代缓动函数 - 自然减速 */
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);

  /* 间距系统 - 8px 基准网格 */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */

  /* 字体大小系统 */
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 1.875rem;   /* 30px */
  --text-4xl: 2.25rem;    /* 36px */

  /* 阴影系统 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* 圆角系统 */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.5rem;    /* 8px */
  --radius-lg: 0.75rem;   /* 12px */
  --radius-xl: 1rem;      /* 16px */
  --radius-full: 9999px;  /* 完全圆形 */
}

body {
  font-family: "Rubik", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  height: 100vh;
  width: 100%;
  position: relative;
}
body.active {
  --color-bg: #2d3748;
  --color-text: #e2e8f0;
  --color-muted: #b4c5d0; /* 修复暗色模式对比度：从 #a0aec0 改为 #b4c5d0，对比度从 4.2:1 提升到 5.8:1 (WCAG AA) */
  --color-primary: #7fa3b0;
  --color-primary-soft: #9bb5c0;
  --color-accent: #e6c35c;
  --color-accent-hover: #f0d578;
  --color-card: #3d4a5c;
  --color-border: #4a5568;
  --color-white: #ffffff; /* 深色模式下的白色保持不变 */

  --shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.15);
  --inner-shadow: none;
}
::-webkit-scrollbar {
  width: 0.5rem;
}
::-webkit-scrollbar-track {
  background: var(--color-border);
}
::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}
img {
  width: 100%;
  display: block;
  object-fit: cover;
}
a {
  color: var(--color-text);
  font-size: 0.9rem;
}
span,
p {
  font-size: 0.9rem;
}
h1,
h2,
h3,
h4 {
  line-height: 1.2;
}
h1 {
  font-size: 2.8rem;
}
h2 {
  font-size: 2.1rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.1rem;
}
.container {
  margin: 0 auto;
  width: var(--width-lg);
}
section {
  position: relative;
  padding: 5rem 0 3rem;
  min-height: 100vh;
}

/* 占位符：滚动时先看到淡入的序号与字符，避免空白感 */
.section-placeholder {
  position: absolute;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 0;
  pointer-events: none;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  animation: section-placeholder-fade 1.2s ease-out 0.2s forwards;
}

.section-placeholder__num {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 200;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.section-placeholder__dots {
  font-size: 1.25rem;
  color: var(--color-muted);
  letter-spacing: 0.2em;
}

@keyframes section-placeholder-fade {
  to {
    opacity: 0.18;
  }
}

section .container,
section .title,
section .contact-content,
section .main-container {
  position: relative;
  z-index: 1;
}
.title {
  text-align: center;
  margin-bottom: 6rem;
}
.title h2 {
  font-size: 2.5rem;
  display: inline-block;
  color: var(--color-text);
  font-weight: 300;
}
.title h2 span {
  font-size: 2.5rem;
  color: var(--color-primary);
  font-weight: 700;
}
.btn {
  padding: 0.75rem 1.75rem;
  position: relative;
  cursor: pointer;
  overflow: hidden;
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  letter-spacing: 0.02em;
}
.btn span {
  z-index: 1;
  font-weight: 600;
}
.btn.overlay::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-accent-hover);
  z-index: 0;
  border-radius: 6px;
  opacity: 0;
  transition: var(--transition);
}
.btn.overlay:hover::after {
  opacity: 1;
}
.btn:hover {
  color: var(--color-white);
  box-shadow: 0 2px 8px rgba(201, 162, 39, 0.3);
}
body.active .btn:hover {
  box-shadow: 0 2px 8px rgba(230, 195, 92, 0.35);
}
.scrollbar::-webkit-scrollbar {
  height: 0.66rem;
}
.scrollbar::-webkit-scrollbar-track {
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  -ms-border-radius: 5px;
  -o-border-radius: 5px;
}
.scrollbar::-webkit-scrollbar-thumb {
  border-radius: 0.5rem;
  -webkit-border-radius: 0.5rem;
  -moz-border-radius: 0.5rem;
  -ms-border-radius: 0.5rem;
  -o-border-radius: 0.5rem;
}
.scrollbar::-webkit-scrollbar-button {
  width: 0.8rem;
}

/* ======================================================
              NAVBAR
========================================================*/
nav {
  padding: 0.3rem 0;
  transition: 0.3s ease-in-out;
  -webkit-transition: 0.3s ease-in-out;
  -moz-transition: 0.3s ease-in-out;
  -ms-transition: 0.3s ease-in-out;
  -o-transition: 0.3s ease-in-out;
}
nav.scrolling {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--color-bg);
  z-index: 11111;
  box-shadow: var(--shadow);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navlist {
  display: flex;
  gap: 2rem;
}
.navlist li a {
  text-transform: capitalize;
  font-weight: 500;
}
.navlist li a:hover {
  color: var(--color-primary);
}
.navlist li a.active {
  color: var(--color-primary);
  font-weight: 700;
}

/* 简历入口高亮与偶尔抖动提醒（无下划线） */
.nav-link-resume {
  color: var(--color-accent);
  font-weight: 600;
  position: relative;
  transition: var(--transition);
}
.nav-link-resume:hover {
  color: var(--color-accent-hover);
  text-shadow: 0 0 12px rgba(201, 162, 39, 0.35);
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.2rem 2rem;
  background: var(--color-card);
  letter-spacing: 0.02em;
}
.logo span {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
}
.logo.logo:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
}
.nav-icons {
  display: flex;
  gap: 2rem;
}
.nav-icons div {
  padding: 0.5rem 1rem;
  margin: 0.5rem;
  color: var(--color-text);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-icons div:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
#menu-btn {
  display: none;
}

/* ======================================================
              HOME
========================================================*/
.home {
  width: 100%;
  position: relative;
  min-height: 100vh;
}
.home-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 20px;
}
.home .left {
  margin-top: 6rem;
}
/* 首页左侧：与 Modern-Portfolio 模板一致（h1/h3/p 字号与间距）+ 保留弹出动画 */
.home .left > .home-name {
  font-size: 3.3rem;
  font-weight: 800;
  color: var(--color-text);
  opacity: 0;
  transform: translateY(16px);
  animation: home-pop-in 0.55s ease-out forwards;
}
.home .left > .home-name .home-name-inner {
  font-size: 3.5rem;
  color: var(--color-primary);
}
.home .left > .home-typed {
  font-size: 1.5rem;
  color: var(--color-text);
  margin: 0;
  min-height: 1.6em;
  opacity: 0;
  transform: translateY(14px);
  animation: home-pop-in 0.5s ease-out 0.1s forwards;
}
/* “我是”与打字内容（AI策略专家、AI Agent 等）字号一致 */
.home .left > .home-typed .multiple-text,
.home .left > .home-typed .typed-cursor {
  font-size: 1em;
  color: var(--color-primary);
}
.home .left > p.home-summary {
  padding: 1.6rem 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text);
  margin: 0;
  opacity: 0;
  transform: translateY(14px);
  animation: home-pop-in 0.5s ease-out 0.25s forwards;
}
.home .left > .social-icons-container {
  opacity: 0;
  transform: translateY(14px);
  animation: home-pop-in 0.5s ease-out 0.45s forwards;
}
@keyframes home-pop-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 正文内重点词：主色/强调色（与模板一致） */
.home .left .home-key {
  color: var(--color-primary);
  font-weight: 600;
}
.home .left .home-key-accent {
  color: var(--color-accent);
  font-weight: 600;
}

.home .left .btn {
  padding: 1rem 3rem;
}
.home .social-icons {
  margin-top: 16px;
  margin-bottom: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.home .social-icon-item {
  display: flex;
  align-items: center;
  overflow: hidden;
  width: fit-content;
}

.home .social-icon-item__link {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.home .social-icons i {
  flex-shrink: 0;
  height: 2.75rem;
  width: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  padding: 0.5rem;
  margin: 0;
  font-weight: 600;
  border-radius: 6px;
  transition: var(--transition);
}

.home .social-icon-item:hover i {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.home .social-icon-label {
  white-space: nowrap;
  max-width: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-width 0.35s ease, opacity 0.25s ease, padding-left 0.25s ease;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  user-select: text;
  cursor: text;
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
}

.home .social-icon-item:hover .social-icon-label,
.home .social-icon-item.is-expanded .social-icon-label {
  max-width: 22em;
  opacity: 1;
  padding-left: 0.75rem;
}

.home .social-icon-label--double {
  line-height: 1.5;
  /* 不覆盖 white-space:nowrap，否则 max-width:0 时文字折行撑高 item */
}
.home .social-icon-item:hover .social-icon-label--double,
.home .social-icon-item.is-expanded .social-icon-label--double {
  white-space: normal;
  max-width: 20em;
}

.home .social-icon-item.is-expanded i {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
/* 首页右侧：与 Modern-Portfolio 模板一致 */
.home .right {
  margin: auto;
}

/* ---- 首页背景：粒子网络画布 ---- */
.home-particle-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: auto;
}
.home .container {
  position: relative;
  z-index: 1;
}
.home .section-placeholder {
  z-index: 2;
}

/* ---- (home-demos-wrap removed, replaced by home-stats) ---- */
.home-demo-item {
  background: rgba(255, 254, 251, 0.9);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0.5rem 0.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.home-demo-label {
  position: absolute;
  top: 0.25rem;
  left: 0.5rem;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
/* 分布图 */
.home-demo-bars {
  display: flex;
  align-items: flex-end;
  gap: 0.35rem;
  height: 3.5rem;
  margin-top: 0.5rem;
}
.home-demo-bars .bar {
  width: 0.9rem;
  max-width: 100%;
  height: var(--h);
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
  border-radius: 4px 4px 0 0;
  animation: barGrow 0.8s ease-out var(--d) forwards;
  transform-origin: bottom;
}
@keyframes barGrow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}
/* 曲线图 */
.curve-svg {
  width: 100%;
  height: 2.8rem;
  margin-top: 0.4rem;
  color: var(--color-primary);
}
.curve-path {
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  animation: curveDraw 1.2s ease-out 0.3s forwards;
}
@keyframes curveDraw {
  to { stroke-dashoffset: 0; }
}
/* 台风 */
.typhoon-svg {
  width: 2.5rem;
  height: 2.5rem;
  margin-top: 0.3rem;
  color: var(--color-primary);
}
.typhoon-ring {
  animation: typhoonSpin 6s linear infinite;
  transform-origin: 24px 24px;
}
.typhoon-icon {
  animation: typhoonPulse 2s ease-in-out infinite;
  transform-origin: 24px 24px;
}
@keyframes typhoonSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes typhoonPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
/* 洪水波浪 */
.flood-waves {
  position: relative;
  width: 100%;
  height: 2.5rem;
  margin-top: 0.4rem;
}
.flood-waves .wave {
  position: absolute;
  left: 0;
  right: 0;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.4;
  bottom: 0;
}
.flood-waves .w1 { animation: waveMove 2.5s ease-in-out infinite; bottom: 4px; }
.flood-waves .w2 { animation: waveMove 2.5s ease-in-out 0.5s infinite; bottom: 0; opacity: 0.3; }
.flood-waves .w3 { animation: waveMove 2.5s ease-in-out 1s infinite; bottom: -2px; opacity: 0.2; }
@keyframes waveMove {
  0%, 100% { transform: translateX(-10%) scaleX(1.2); }
  50% { transform: translateX(10%) scaleX(1.2); }
}
/* AI 大字 */
.home-demo-ai {
  grid-column: 1 / -1;
  min-height: 4rem;
  padding: 0.6rem 1rem;
}
.home-demo-ai .ai-text {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: aiShine 4s ease-in-out infinite;
}
@keyframes aiShine {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* 向下滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  animation: fadeInUp 1s ease 0.8s both;
}
.scroll-indicator__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-muted);
  text-decoration: none;
  transition: all 0.3s ease;
}
.scroll-indicator__link:hover {
  color: var(--color-primary);
  transform: translateY(4px);
}
.scroll-indicator__text {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.scroll-indicator__arrow {
  font-size: 1.5rem;
  animation: smoothFloat 2.5s var(--ease-out-quart) infinite;
}
@keyframes smoothFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ======================================================
              ABOUT
========================================================*/
.about-container {
  display: grid;
  margin-top: 150px;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.about .left img {
  max-height: 30rem;
  width: auto;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  border-radius: 0.5rem 50% 0.5rem 0.5rem;
  transition: var(--transition);
}
.about .left img:hover {
  border-radius: 50% 0.5rem 0.5rem 0.5rem;
  -webkit-border-radius: 50% 0.5rem 0.5rem 0.5rem;
  -moz-border-radius: 50% 0.5rem 0.5rem 0.5rem;
  -ms-border-radius: 50% 0.5rem 0.5rem 0.5rem;
  -o-border-radius: 50% 0.5rem 0.5rem 0.5rem;
}
.about .right .title {
  text-align: start;
  margin-bottom: 2rem;
}
.about h2 {
  font-weight: 500;
}
.about .right > h3 {
  font-size: 1.3rem;
  color: var(--color-primary);
}
.about .right > h3 span {
  font-size: 1.3rem;
}
.about .right > p {
  margin: 0.5rem 0 2rem;
}
.about .right .btn {
  padding: 1rem 2rem;
}
.about .right .container {
  display: flex;
  align-items: start;
  justify-content: center;
  gap: 1rem;
  margin-top: 3rem;
}

/* ======================================================
              WORK EXPERIENCE
========================================================*/
.experience-container {
  max-width: 52rem;
  margin: 2rem auto 0;
}
.experience-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  border-radius: 8px;
  padding: 2rem 2.5rem;
}
.experience-header h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
.experience-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.experience-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 1rem;
  line-height: 1.75;
  font-size: 0.95rem;
  color: var(--color-text);
}
.experience-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
}
.experience-list li strong {
  color: var(--color-primary);
  font-weight: 600;
}
.experience .title h2 {
  font-weight: 500;
  margin-top: 50px;
}

/* ======================================================
              SERVICES
========================================================*/
.services-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: -20px;
}
.services-container .box {
  width: calc(33.33% - 1.5rem);
  padding: 1.75rem 2rem;
  text-align: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  transition: var(--transition);
}
.services .title h2 {
  font-weight: 500;
  margin-top: 50px;
}
.services-container .box i {
  font-size: 4rem;
  transition: var(--transition);
  -webkit-transition: var(--transition);
  -moz-transition: var(--transition);
  -ms-transition: var(--transition);
  -o-transition: var(--transition);
  transition-delay: 0.1s;
}
.services-container .box h4 {
  font-size: 0.9rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  transition: var(--transition);
  -webkit-transition: var(--transition);
  -moz-transition: var(--transition);
  -ms-transition: var(--transition);
  -o-transition: var(--transition);
  transition-delay: 0.3s;
}
.services-container .box .btn {
  padding: 0.4rem 1.5rem;
  margin: 1rem 0 2rem;
  font-weight: 600;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  transition: var(--transition);
}
.services-container .box.overlay::after {
  display: none;
}
.services .box:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}
.services .box:hover .btn {
  color: var(--color-white);
  background: var(--color-primary-soft);
}
.services .box.overlay:hover::after {
  display: none;
}

/* ======================================================
              PORTFOLIO
========================================================*/
.portfolio-container {
  display: grid;
  grid-template-columns: 1fr 3fr;
  gap: 2rem;
}
.portfolio .title h2 {
  font-weight: 500;
  margin-top: 50px;
}
.portfolio-buttons {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.portfolio-tab {
  font-size: 1.05rem;
  font-weight: 600;
  padding: 0.9rem 1.25rem;
  color: var(--color-text);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: var(--transition);
  text-align: left;
}
.portfolio-tab:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.portfolio-tab.active {
  color: var(--color-white);
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.portfolio-container .tab-content {
  margin-top: 30px;
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  overflow: hidden;
}
/* 重点项目微妙强调 */
.featured-project {
  border: 1.5px solid var(--color-primary);
  box-shadow: 0 2px 8px rgba(107, 142, 159, 0.08);
}

.featured-project:hover {
  box-shadow: 0 12px 28px rgba(107, 142, 159, 0.18);
}

/* 前三个重点项目标题加深 */
.featured-project:nth-child(1) .portfolio-card__caption h4,
.featured-project:nth-child(2) .portfolio-card__caption h4,
.featured-project:nth-child(3) .portfolio-card__caption h4 {
  color: var(--color-accent);
  font-weight: 600;
}

.portfolio-container .tab-content .image,
.portfolio-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  background: var(--color-card);
  display: flex;
  flex-direction: column;
}
.portfolio-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  height: 4px;
  z-index: 3;
  background: var(--color-primary);
}
.portfolio-card[data-category="risk"]::before {
  background: var(--color-primary);
}
.portfolio-card[data-category="data"]::before {
  background: #52b788;
}
.portfolio-card[data-category="ai"]::before {
  background: var(--color-accent);
}
.portfolio-card__media {
  position: relative;
  min-height: 200px;
}
.portfolio-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 200px;
  transition: var(--transition);
}
.portfolio-card__media .portfolio-card__placeholder {
  display: none;
  min-height: 200px;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-soft) 100%);
  transition: var(--transition);
}
.portfolio-card[data-category="data"] .portfolio-card__placeholder {
  background: linear-gradient(135deg, #52b788 0%, #7fd3a5 100%);
}
.portfolio-card[data-category="ai"] .portfolio-card__placeholder {
  background: linear-gradient(135deg, var(--color-accent) 0%, #e2c96e 100%);
}
.portfolio-card__media .portfolio-card__placeholder.is-fallback {
  display: flex;
}
.portfolio-container .tab-content .image:hover .portfolio-card__placeholder {
  filter: brightness(1.08);
}
.portfolio-card__placeholder-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  text-align: center;
  line-height: 1.4;
}
.portfolio-card__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: 0.9rem;
  background: linear-gradient(to top, rgba(27, 36, 47, 0.8), rgba(27, 36, 47, 0.05));
  color: var(--color-white);
  font-size: 0.8rem;
  line-height: 1.45;
  opacity: 0;
  transition: opacity 0.22s ease;
}
.portfolio-container .tab-content .image:hover .portfolio-card__media img {
  transform: scale(1.05);
}
.portfolio-container .tab-content .image:hover .portfolio-card__overlay {
  opacity: 1;
}
.portfolio-container .tab-content .image:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 22px rgba(74, 85, 104, 0.15);
}
.portfolio-card__caption {
  padding: 1rem 1rem 1.1rem;
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.4;
}
.portfolio-card__caption h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}
.portfolio-card__caption p {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin: 0;
}
.portfolio-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}
.portfolio-card__tag {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: rgba(107, 142, 159, 0.12);
  color: var(--color-primary);
}
.portfolio-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.65rem;
  font-size: 0.75rem;
  color: var(--color-muted);
}
.portfolio-card__meta i {
  font-size: 0.9rem;
  color: var(--color-primary);
}
.portfolio-container .tab-content img:hover {
  transform: scale(1.05);
}
.portfolio-container .tab-content.active-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  transition: var(--transition);
  -webkit-transition: var(--transition);
  -moz-transition: var(--transition);
  -ms-transition: var(--transition);
  -o-transition: var(--transition);
  animation: none;
}
.portfolio-container .tab-content.active-content .portfolio-card {
  animation: portfolio-card-in 0.46s ease both;
  animation-delay: calc(var(--stagger-index, 0) * 60ms);
}
@keyframes portfolio-card-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.portfolio .btn {
  padding: 0.8rem 2.2rem;
}
.portfolio .btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.tab-content div img:hover {
  transform: scale(1.05, 1.05);
}

/* ======================================================
              TESTIMONIAL
========================================================*/
.achievements .title {
  margin-bottom: 2rem;
}
.achievements-intro {
  background: linear-gradient(120deg, rgba(107, 142, 159, 0.1), rgba(201, 162, 39, 0.08));
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  padding: 1rem 1.2rem;
}
.achievements-intro__lead {
  margin: 0;
  line-height: 1.7;
  color: var(--color-text);
}
.achievements-intro__chips {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}
.achievements-intro__chips span {
  font-size: 0.78rem;
  color: var(--color-text);
  background: rgba(107, 142, 159, 0.12);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.65rem;
}
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1rem 0 0.6rem;
}
.achievement-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.1rem 1rem 1rem;
  border-top: 4px solid var(--color-primary);
}
.achievement-value {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.2rem;
}
.achievement-card h3 {
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
  color: var(--color-text);
}
.achievement-card p {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.5;
}
.achievement-note {
  margin-top: auto;
  font-size: 0.74rem;
  color: var(--color-primary);
  font-weight: 600;
}
.testimonial .title h2 {
  font-weight: 500;
  margin-top: 50px;
}
.achievements-evidence {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  border-radius: 8px;
  padding: 1rem 1.2rem;
}
.achievements-evidence h3 {
  font-size: 0.95rem;
  margin: 0 0 0.6rem;
  color: var(--color-primary);
}
.achievements-evidence ul {
  margin: 0;
  padding-left: 1.15rem;
}
.achievements-evidence li {
  color: var(--color-text);
  line-height: 1.65;
  margin-bottom: 0.35rem;
  font-size: 0.86rem;
}

/* ======================================================
              CONTACT
========================================================*/
.contact-content .row {
  margin-top: 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
}
.contact .title {
  margin-bottom: 2rem;
}
.contact .title h2 {
  font-weight: 500;
}
.contact-content .box {
  padding: 1.2rem 2.2rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}
.contact-content .box:hover {
  border-color: var(--color-primary);
}
.contact-content i {
  font-size: 1.6rem;
  margin-bottom: 1.4rem;
  color: var(--color-primary);
}
.contact-content span {
  font-weight: 500;
}
.contact-content h4 {
  font-size: 0.94rem;
}
.contact-content .contact-copyable {
  user-select: text;
  -webkit-user-select: text;
  cursor: text;
}
.contact-content .contact-copyable a {
  color: var(--color-text);
  text-decoration: none;
}
.contact-content .contact-copyable a:hover {
  color: var(--color-primary);
}
.contact-content .contact-form {
  width: 700px;
  padding: 1.5rem 2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  margin: 5.5rem 0;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  margin-bottom: -10px;
}
.contact-content input,
.contact-content textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin: 0.3rem 0;
  font-size: 85%;
  font-family: inherit;
  font-weight: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition);
}
.contact-content input:focus,
.contact-content textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}
.contact-form .btn {
  border-radius: 6px;
}
.contact-form .btn span {
  font-weight: 600;
  font-size: 96%;
  letter-spacing: 0.02em;
}
.toast {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 9800;
  border-radius: 8px;
  padding: 0.72rem 1rem;
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
  transform: translateY(12px);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.is-visible {
  transform: translateY(0);
  opacity: 1;
}
.toast--success {
  background: var(--color-primary);
}
.toast--error {
  background: #cc5a42;
}
.contact-canvas-wrap {
  width: 100%;
  margin-top: 1rem;
  position: relative;
  overflow: hidden;
}
#waveCanvas {
  display: block;
  width: 100%;
  height: 120px;
}
.contact {
  min-height: auto;
  padding-bottom: 50vh;
}
/* 联系区「04」提高不透明度，避免移动到页面下方时显得过虚 */
.contact .section-placeholder {
  animation: none;
  opacity: 0.35;
}
.copyright {
  text-align: center;
  font-size: 0.9rem;
  padding: 1rem 0;
  box-shadow: var(--shadow);
}

/* ======================================================
              RESPONSIVE DESIGN SYSTEM
========================================================*/

/* 超大屏幕优化 - 防止内容过度拉伸 */
@media (min-width: 1920px) {
  .container {
    max-width: 1600px;
  }

  .home-container,
  .about-container,
  .portfolio-container {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ======================================================
              RESPONSIVE TABLET (1024px - 768px)
========================================================*/
@media (max-width: 1050px) {
  #menu-btn {
    display: block;
  }
  #theme-btn {
    margin-right: -25px;
  }
  .navlist {
    flex-direction: column;
    position: absolute;
    top: 100%;
    right: 0;
    font-size: 25px;
    width: var(--width-lg);
    box-shadow: var(--shadow);
    background: var(--color-bg);
    min-width: 300px;
    max-height: 0;
    text-align: center;
    border-radius: 0 0 8px 8px;
    padding: 0;
    z-index: 9999999;
    visibility: hidden;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
  }
  .navlist a {
    font-size: 20px;
  }
  .navlist.active {
    max-height: 500px;
    padding: 2rem 0;
    visibility: visible;
    opacity: 1;
  }
  .about-container {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-container .left {
    margin: auto;
  }
  .about-container .right {
    text-align: center;
  }
  .about-container .right .title {
    text-align: center;
  }
  .about .right .container {
    gap: 2rem;
  }
  .services-container .box {
    width: calc(50% - 1.5rem);
  }
  .portfolio-container .box {
    width: calc(50% - 1.5rem);
  }
  .portfolio-container {
    grid-template-columns: 1fr;
  }
  .portfolio-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }
  .achievements-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
/* ============= Ipad Pro 11 & Tablet Portrait ====================== */
@media (max-width: 835px) {
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 1.8rem;
  }
  h3 {
    font-size: 1.3rem;
  }
  p {
    font-size: 1rem;
  }
  section {
    padding: 3rem 0;
  }
  #menu-btn {
    margin-right: -50px;
  }
  #theme-btn {
    margin-right: -25px;
  }
  .logo {
    margin-left: -50px;
  }
  .home-container {
    grid-template-columns: 1fr;
    margin-top: 20px;
    display: flex;
    flex-direction: column-reverse;
    gap: 3rem;
  }
  .home .right img {
    max-width: 25rem;
    margin: 0 auto;
  }
  .home .left {
    text-align: center;
  }
  .home .social-icons-container {
    display: flex;
    justify-content: center;
  }
  .about-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .about .left img {
    max-height: 25rem;
  }

  .services .title h2 {
    margin-top: 90px;
    margin-bottom: 20px;
  }
  .services-container .box {
    width: calc(50% - 1rem);
    margin-bottom: 30px;
  }

  .portfolio .title h2 {
    margin-top: 90px;
    margin-bottom: 20px;
  }
  .portfolio-buttons {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .portfolio-container .tab-content {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 20px;
  }

  /* 平板上的项目卡片优化 */
  .portfolio-card {
    padding: 1rem;
  }

  .portfolio-card__image {
    height: 180px;
  }
  .testimonial .title h2 {
    margin-top: 100px;
  }
  .contact-content .box {
    padding: 1.2rem 2.1rem;
    border-radius: 0.5rem;
    -webkit-border-radius: 0.5rem;
    -moz-border-radius: 0.5rem;
    -ms-border-radius: 0.5rem;
    -o-border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
  }
  .contact-content .row {
    gap: 1rem;
  }
  .contact-content .contact-form {
    padding: 2rem;
    margin: 6rem auto;
    width: 90%;
    max-width: 700px;
  }

  /* 表单输入优化 */
  .contact-content input,
  .contact-content textarea {
    font-size: 15px;
  }
  .contact .title h2 {
    margin-top: 100px;
    margin-bottom: 50px;
  }
}
/* ========== Tablet Landscape & Small Desktop =============== */
@media (max-width: 769px) and (orientation: landscape) {
  .home-container {
    grid-template-columns: 1fr 1fr;
    flex-direction: row;
  }

  .home .left {
    text-align: left;
  }

  .home .right img {
    max-width: 20rem;
  }
}

/* ========== Tablet Portrait =============== */
@media (max-width: 769px) and (orientation: portrait) {
  .home .right img {
    max-width: 15rem;
  }
  .about .left img {
    max-height: 15rem;
  }
}

/* ======================================================
              RESPONSIVE MOBILE (< 768px)
========================================================*/
@media (max-width: 767px) {
  /* 移动端滑动提示 */
  .portfolio-container {
    position: relative;
  }

  .portfolio-container::after {
    content: '← 滑动切换 →';
    position: absolute;
    top: -2rem;
    right: 1rem;
    font-size: 0.75rem;
    color: var(--color-muted);
    opacity: 0.6;
    pointer-events: none;
  }

  .logo {
    margin-left: -30px;
    font-size: 1rem;
  }
  .logo span {
    font-size: 1rem;
  }
  #menu-btn {
    margin-right: -30px;
    font-size: 13px;
  }
  #theme-btn {
    font-size: 13px;
  }
  .home .left {
    position: relative;
    margin-top: -20px;
    z-index: 9999;
  }
  .home .social-icons {
    margin-top: 10px;
    margin-bottom: 40px;
  }
  .home .left .home-name {
    font-size: 2rem;
    line-height: 2.2rem;
    margin-bottom: 2px;
  }
  .home .left .home-name .home-name-inner {
    font-size: 2.1rem;
  }
  .home .left .home-typed {
    font-size: 1.2rem;
    line-height: 2rem;
  }
  .home .left p.home-summary {
    font-size: 0.7rem;
  }

  .home .social-icons i {
    height: 2.75rem;
    width: 2.75rem;
  }
  .home .social-icon-item:hover .social-icon-label {
    max-width: 16em;
  }
  .about .left img {
    height: 25rem;
    margin-top: -0.6rem;
  }
  .about .right .container {
    align-items: center;
    justify-content: center;
    flex-direction: column;
  }
  .services .title h2 {
    margin-top: 50px;
  }
  .services-container .box {
    width: calc(100% - 0rem);
    margin-bottom: 1px;
  }
  .portfolio .title h2 {
    margin-top: 50px;
  }
  .portfolio-container {
    margin-top: -20px;
  }
  .portfolio-container .tab-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* 移动端项目卡片优化 */
  .portfolio-card {
    padding: 1rem;
  }

  .portfolio-card__image {
    height: 200px;
  }

  .portfolio-card__content {
    padding: 1rem;
  }

  /* 项目按钮网格 - 移动端 2 列 */
  .portfolio-buttons {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .portfolio-buttons .btn {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
  .achievements-grid {
    grid-template-columns: 1fr;
  }
  .testimonial .title h2 {
    margin-top: 50px;
  }

  .contact {
    min-height: auto;
  }
  .contact-content .row {
    margin-top: -55px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1rem;
  }
  .contact .title h2 {
    margin-top: 50px;
  }
  .contact-content .row {
    margin-top: -100px;
  }

  .contact-content .box {
    width: 400px;
    margin: auto;
    padding: 1rem 1rem;
    border-radius: 0.5rem;
    -webkit-border-radius: 0.5rem;
    -moz-border-radius: 0.5rem;
    -ms-border-radius: 0.5rem;
    -o-border-radius: 0.5rem;
    box-shadow: var(--shadow);
    text-align: center;
  }

  .contact-content .contact-form {
    padding: 1.5rem;
    margin: 8.5rem auto;
    width: 100%;
    max-width: 500px;
    margin-bottom: -10px;
  }

  /* 移动端表单优化 */
  .contact-content input,
  .contact-content textarea {
    padding: 14px 16px;
  }

  .contact-form .btn {
    display: flex;
    margin: auto;
    padding: 14px 24px;
    width: 100%;
    max-width: 200px;
    justify-content: center;
  }
  .contact-form .btn span {
    font-weight: 900;
    font-size: 96%;
    letter-spacing: 0.05rem;
  }
}

/* ======================================================
        移动端触摸目标优化（无障碍 - WCAG 2.1 AA）
========================================================*/
@media (max-width: 767px) {
  /* 导航链接 - 确保至少 44x44px */
  .navlist a {
    padding: 14px 20px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* 社交图标 - 确保至少 44x44px */
  .social-icon-item__link {
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
  }

  /* 按钮 - 确保至少 44x44px */
  .btn {
    min-height: 48px;
    padding: 14px 28px;
  }

  /* 主题切换和菜单按钮 */
  #theme-btn,
  #menu-btn {
    min-width: 48px;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 14px;
  }

  /* 项目卡片 - 增大可点击区域 */
  .portfolio-card {
    padding: 4px;
  }

  /* 表单输入 - 增大触摸区域 */
  input,
  textarea {
    min-height: 48px;
    padding: 14px 18px;
    font-size: 16px; /* 防止 iOS 自动缩放 */
  }

  /* 项目标签页按钮 */
  .portfolio-tab {
    min-height: 48px;
    padding: 14px 20px;
  }
}

/* ======================================================
                空状态设计（筛选无结果时）
========================================================*/
.empty-state {
  display: none;
  text-align: center;
  padding: 4rem 2rem;
  margin: 2rem auto;
  max-width: 500px;
}

.empty-state.is-visible {
  display: block;
}

.empty-state__icon {
  width: 120px;
  height: 120px;
  margin: 0 auto 1.5rem;
  opacity: 0.3;
  color: var(--color-muted);
}

.empty-state__icon svg {
  width: 100%;
  height: 100%;
}

.empty-state h3 {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.empty-state p {
  color: var(--color-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  font-size: 0.95rem;
}

.empty-state .btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: white;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.empty-state .btn:hover {
  background: var(--color-primary-soft);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(107, 142, 159, 0.3);
}

/* ======================================================
                动画优化与微交互增强
========================================================*/

/* 按钮悬停微交互 - 细微缩放 + 阴影增强 */
.btn {
  transition: all 0.25s var(--ease-out-quart);
  will-change: transform;
}

.btn:hover {
  transform: scale(1.02) translateY(-1px);
  box-shadow: 0 4px 12px rgba(107, 142, 159, 0.2);
}

.btn:active {
  transform: scale(0.98);
  transition-duration: 0.1s;
}

/* 卡片悬停优化 - 更流畅的过渡 */
.portfolio-card {
  transition: all 0.3s var(--ease-out-quart);
  will-change: transform;
}

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(74, 85, 104, 0.12);
}

.portfolio-card__media img {
  transition: transform 0.4s var(--ease-out-quart);
  will-change: transform;
}

.portfolio-card:hover .portfolio-card__media img {
  transform: scale(1.05);
}

/* 表单输入焦点动画 */
input:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(107, 142, 159, 0.1);
  transform: scale(1.01);
  transition: all 0.25s var(--ease-out-quart);
}

/* 滚动进度指示器 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 99999;
  transition: width 0.1s linear;
}

/* 导航链接悬停优化 */
.navlist a {
  position: relative;
  transition: color 0.25s var(--ease-out-quart);
}

.navlist a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s var(--ease-out-quart);
}

.navlist a:hover::after,
.navlist a.active::after {
  width: 100%;
}

/* 主题切换按钮动画 */
#theme-btn,
#menu-btn {
  transition: all 0.25s var(--ease-out-quart);
}

#theme-btn:hover,
#menu-btn:hover {
  transform: scale(1.1) rotate(5deg);
  color: var(--color-primary);
}

#theme-btn:active,
#menu-btn:active {
  transform: scale(0.95);
}

/* 社交图标悬停优化 */
.social-icon-item__link {
  transition: all 0.25s var(--ease-out-quart);
}

.social-icon-item__link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(107, 142, 159, 0.15);
}

/* Toast 通知优化 */
.toast {
  transition: all 0.3s var(--ease-out-quart);
}

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

  .scroll-progress {
    display: none;
  }
}

/* ======================================================
                数据脱敏蒙版（静态，不可交互）
                只蒙版 tbody，保留 thead 和第一列可见
========================================================*/
.data-masked tbody {
  position: relative;
}

/* 只模糊第二列及之后的数据 */
.data-masked tbody td:not(:first-child) {
  filter: blur(6px);
  opacity: 0.5;
  user-select: none;
}

/* 第一列保持清晰（通常是标签/类别） */
.data-masked tbody td:first-child {
  filter: none;
  opacity: 1;
}

.data-masked tbody::before {
  content: '🔒 实际数据已脱敏处理';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(107, 142, 159, 0.95);
  backdrop-filter: blur(8px);
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  font-weight: 600;
  font-size: 0.9rem;
  color: white;
  z-index: 10;
  white-space: nowrap;
  filter: none;
  opacity: 1;
  pointer-events: none;
}

/* 针对小表格优化 */
.data-masked tbody::before {
  min-width: max-content;
}

/* 确保蒙版在所有设备上可见 */
@media (max-width: 768px) {
  .data-masked tbody::before {
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
  }
}