/* ============================================================
   AI 短剧作品集 — Apple 极简风格样式表

   【留白控制指南】
   - --space-section / --space-hero：区块垂直间距
   - --content-max + --content-padding：内容宽度与两侧留白
   - --space-grid：作品网格卡片间距

   【字体层级指南】
   - --text-hero     → 主标题 H1
   - --text-slogan   → Slogan / 副文案
   - --text-section  → 区块标题
   - --text-card     → 卡片标题
   - --text-body     → 正文
   - --text-caption  → 辅助说明 / 版权
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --color-teal-deep: #0c4a44;
  --color-teal-mid: #0f766e;
  --color-teal-accent: #0d9488;
  --color-mint: #6ee7b7;
  --color-mint-light: #99f6e4;

  --space-hero: clamp(120px, 22vh, 200px);
  --space-section: clamp(80px, 14vh, 160px);
  --space-grid: clamp(20px, 3vw, 32px);
  --content-max: 1200px;
  --content-padding: clamp(20px, 5vw, 48px);

  --text-hero: clamp(3.2rem, 8.5vw, 6.5rem);
  --text-slogan: clamp(1.05rem, 2vw, 1.3rem);
  --text-section: clamp(1.75rem, 3.5vw, 2.25rem);
  --text-card: 0.9375rem;
  --text-body: clamp(1rem, 1.8vw, 1.125rem);
  --text-caption: 0.8125rem;

  /* 亮色：饱和青绿渐变，减少泛白 */
  --bg-gradient: linear-gradient(
    180deg,
    #064e47 0%,
    var(--color-teal-mid) 28%,
    #2dd4bf 62%,
    #5eead4 100%
  );
  --text-primary: #0f2926;
  --text-secondary: rgba(15, 41, 38, 0.72);
  --text-muted: rgba(15, 41, 38, 0.5);
  --text-on-hero: #ffffff;
  --text-slogan-hero: rgba(255, 255, 255, 0.82);
  --hero-title-gradient: linear-gradient(
    180deg,
    #ffffff 0%,
    #ecfdf5 55%,
    #a7f3d0 100%
  );

  --card-bg: rgba(6, 78, 71, 0.18);
  --card-bg-solid: rgba(255, 255, 255, 0.12);
  --panel-bg: rgba(6, 78, 71, 0.22);
  --card-shadow: 0 4px 24px rgba(6, 46, 42, 0.18);
  --card-shadow-hover: 0 12px 36px rgba(6, 46, 42, 0.28);

  --tool-item-bg: rgba(255, 255, 255, 0.1);
  --tool-item-border: rgba(255, 255, 255, 0.18);
  --tool-item-hover: rgba(255, 255, 255, 0.18);

  --toggle-bg: rgba(255, 255, 255, 0.2);
  --toggle-border: rgba(255, 255, 255, 0.35);
  --toggle-color: #ffffff;
  --footer-color: rgba(15, 41, 38, 0.55);
  --placeholder-text: rgba(255, 255, 255, 0.75);
  --accent-hover: #ecfdf5;

  --transition: 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

body.dark {
  --bg-gradient: linear-gradient(
    180deg,
    #0c1619 0%,
    #152428 30%,
    #1a3338 55%,
    #1e3d42 100%
  );
  --text-primary: #ecfdf5;
  --text-secondary: rgba(204, 251, 241, 0.72);
  --text-muted: rgba(153, 246, 228, 0.45);
  --text-on-hero: #f0fdf9;
  --text-slogan-hero: rgba(167, 243, 208, 0.75);
  --hero-title-gradient: linear-gradient(
    180deg,
    #ffffff 0%,
    #ccfbf1 50%,
    #5eead4 100%
  );

  --card-bg: rgba(12, 28, 32, 0.72);
  --card-bg-solid: rgba(20, 45, 50, 0.85);
  --panel-bg: rgba(14, 32, 36, 0.78);
  --card-shadow: 0 4px 28px rgba(0, 0, 0, 0.35);
  --card-shadow-hover: 0 14px 40px rgba(15, 118, 110, 0.22);

  --tool-item-bg: rgba(255, 255, 255, 0.04);
  --tool-item-border: rgba(94, 234, 212, 0.14);
  --tool-item-hover: rgba(20, 184, 166, 0.12);

  --toggle-bg: rgba(30, 55, 60, 0.85);
  --toggle-border: rgba(94, 234, 212, 0.25);
  --toggle-color: #99f6e4;
  --footer-color: rgba(167, 243, 208, 0.4);
  --placeholder-text: rgba(255, 255, 255, 0.5);
  --accent-hover: #5eead4;
}

/* ---------- 全局重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
    "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 100vh;
  background: var(--bg-gradient);
  background-attachment: fixed;
  transition: color var(--transition), background var(--transition);
  position: relative;
}

body.dark::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 90% 55% at 50% -5%, rgba(15, 118, 110, 0.45) 0%, transparent 55%),
    radial-gradient(ellipse 70% 45% at 80% 90%, rgba(20, 184, 166, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 15% 75%, rgba(45, 212, 191, 0.12) 0%, transparent 45%);
}

body > *:not(.theme-toggle):not(.chatbot) {
  position: relative;
  z-index: 1;
}

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

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

address {
  font-style: normal;
}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle {
  position: fixed;
  top: clamp(16px, 3vw, 28px);
  right: clamp(16px, 3vw, 28px);
  z-index: 9999;
  width: 46px;
  height: 46px;
  border: 1px solid var(--toggle-border);
  border-radius: 50%;
  background: var(--toggle-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--toggle-color);
  font-size: 1.15rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
  pointer-events: auto;
}

.theme-toggle:hover {
  transform: scale(1.08);
  border-color: var(--color-mint);
}

.theme-toggle__icon--dark {
  display: none;
}

body.dark .theme-toggle__icon--light {
  display: none;
}

body.dark .theme-toggle__icon--dark {
  display: block;
}

/* ---------- Hero 区域 ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-hero) var(--content-padding);
}

.hero__eyebrow {
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--text-slogan-hero);
  margin-bottom: clamp(12px, 2vh, 20px);
  opacity: 0.85;
}

.hero__title {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: var(--text-hero);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.15;
  background: var(--hero-title-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 20px rgba(0, 0, 0, 0.15));
}

body.dark .hero__title {
  filter: drop-shadow(0 2px 28px rgba(15, 118, 110, 0.35));
}

.hero__slogan {
  margin-top: clamp(20px, 3.5vh, 32px);
  font-size: var(--text-slogan);
  font-weight: 400;
  color: var(--text-slogan-hero);
  letter-spacing: 0.12em;
}

/* ---------- 作品展示区 ---------- */
.portfolio {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-padding) var(--space-section);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-grid);
}

.portfolio-card {
  border: none;
  background: none;
  cursor: pointer;
}

.portfolio-card__poster {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 14px;
  overflow: hidden;
  background: var(--card-bg-solid);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--card-shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.portfolio-card:hover .portfolio-card__poster {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
}

.portfolio-card__img,
.portfolio-card__video,
.portfolio-card__placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portfolio-card__video {
  display: block;
}

/* 播放按钮 — 悬停时半透明浮现 */
.portfolio-card__play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: 2;
}

.portfolio-card:hover .portfolio-card__play-btn {
  opacity: 1;
}

/* 播放中隐藏按钮 */
.portfolio-card--playing .portfolio-card__play-btn {
  opacity: 0;
}

.portfolio-card--playing:hover .portfolio-card__play-btn {
  opacity: 0;
}

.portfolio-card__placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 200;
  color: var(--placeholder-text);
  background: linear-gradient(
    165deg,
    hsla(var(--hue, 168), 55%, 32%, 0.85) 0%,
    hsla(var(--hue, 168), 48%, 42%, 0.65) 100%
  );
}

.portfolio-card__title {
  margin-top: 16px;
  font-size: var(--text-card);
  font-weight: 500;
  text-align: center;
  color: var(--text-primary);
  letter-spacing: 0.03em;
}

body.light .portfolio-card__title {
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 1px 8px rgba(6, 46, 42, 0.25);
}

/* ---------- 工具与技术栈 ---------- */
.toolkit {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-section) var(--content-padding);
}

.toolkit__header {
  text-align: center;
  margin-bottom: clamp(36px, 5vh, 56px);
}

.toolkit__title {
  font-size: var(--text-section);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

body.light .toolkit__title {
  color: rgba(255, 255, 255, 0.95);
}

.toolkit__desc {
  font-size: var(--text-caption);
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

body.light .toolkit__desc {
  color: rgba(255, 255, 255, 0.65);
}

.toolkit__grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(16px, 2.5vw, 24px);
}

.toolkit__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: clamp(28px, 4vw, 40px) 20px;
  border-radius: 16px;
  background: var(--tool-item-bg);
  border: 1px solid var(--tool-item-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}

.toolkit__item:hover {
  background: var(--tool-item-hover);
  transform: translateY(-3px);
  border-color: rgba(110, 231, 183, 0.35);
}

.toolkit__item-name {
  font-size: clamp(1.125rem, 2vw, 1.35rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--text-primary);
}

body.light .toolkit__item-name {
  color: rgba(255, 255, 255, 0.95);
}

.toolkit__item-role {
  font-size: var(--text-caption);
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}

body.light .toolkit__item-role {
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- 联系我 ---------- */
.contact {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(100px, 18vh, 200px) var(--content-padding) var(--space-section);
  text-align: center;
}

.contact__header {
  margin-bottom: clamp(40px, 6vh, 64px);
}

.contact__title {
  font-size: var(--text-section);
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

body.light .contact__title {
  color: rgba(255, 255, 255, 0.95);
}

.contact__subtitle {
  font-size: var(--text-body);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.06em;
  max-width: 420px;
  margin: 0 auto;
  line-height: 1.8;
}

body.light .contact__subtitle {
  color: rgba(255, 255, 255, 0.7);
}

.contact__panel {
  max-width: 520px;
  margin: 0 auto;
  padding: clamp(32px, 5vw, 48px) clamp(28px, 4vw, 40px);
  border-radius: 20px;
  background: var(--panel-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--card-shadow);
}

.contact__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact__row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: clamp(18px, 3vh, 24px) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: color var(--transition);
  cursor: pointer;
}

body.light .contact__row {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.contact__row:last-of-type {
  border-bottom: none;
}

.contact__row:hover .contact__value {
  color: var(--accent-hover);
}

body.light .contact__row:hover .contact__value {
  color: #ffffff;
}

.contact__row--static {
  cursor: default;
}

.contact__label {
  font-size: var(--text-caption);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
}

body.light .contact__label {
  color: rgba(255, 255, 255, 0.5);
}

.contact__value {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  line-height: 1.6;
  transition: color var(--transition);
}

body.light .contact__value {
  color: rgba(255, 255, 255, 0.88);
}

.contact__note {
  margin-top: clamp(24px, 4vh, 32px);
  padding-top: clamp(20px, 3vh, 28px);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: var(--text-caption);
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  line-height: 1.8;
}

body.light .contact__note {
  border-top-color: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- 页脚 ---------- */
.footer {
  padding: clamp(40px, 8vh, 80px) var(--content-padding) clamp(32px, 5vh, 56px);
  text-align: center;
}

.footer__copy {
  font-size: var(--text-caption);
  color: var(--footer-color);
  letter-spacing: 0.04em;
}

body.light .footer__copy {
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 智能客服机器人 圆圆 ---------- */
.chatbot {
  position: fixed;
  bottom: clamp(20px, 3vw, 32px);
  right: clamp(20px, 3vw, 32px);
  z-index: 9998;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* 浮动按钮 — 青绿调和网站主题 */
.chatbot__toggle {
  width: 56px;
  height: 56px;
  border: 1.5px solid rgba(110, 231, 183, 0.35);
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(13, 148, 136, 0.28), rgba(15, 118, 110, 0.2));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #ecfdf5;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 24px rgba(6, 78, 71, 0.25);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
}

.chatbot__toggle:hover {
  transform: scale(1.08);
  border-color: rgba(110, 231, 183, 0.6);
  box-shadow: 0 6px 32px rgba(6, 78, 71, 0.4);
}

.chatbot__toggle-icon--close {
  display: none;
}

.chatbot--open .chatbot__toggle-icon--open {
  display: none;
}

.chatbot--open .chatbot__toggle-icon--close {
  display: block;
}

/* 对话面板 — 深青绿毛玻璃 */
.chatbot__panel {
  position: fixed;
  bottom: 88px;
  right: clamp(20px, 3vw, 32px);
  width: 360px;
  height: 520px;
  max-height: calc(100vh - 160px);
  border-radius: 20px;
  background: linear-gradient(175deg, rgba(6, 78, 71, 0.94) 0%, rgba(12, 74, 68, 0.96) 100%);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border: 1px solid rgba(110, 231, 183, 0.18);
  box-shadow: 0 8px 48px rgba(6, 46, 42, 0.35), 0 0 0 1px rgba(110, 231, 183, 0.08) inset;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(16px) scale(0.96);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

body.light .chatbot__panel {
  background: linear-gradient(175deg, rgba(8, 90, 82, 0.88) 0%, rgba(6, 70, 63, 0.92) 100%);
  border-color: rgba(110, 231, 183, 0.22);
}

body.dark .chatbot__panel {
  background: linear-gradient(175deg, rgba(14, 60, 56, 0.94) 0%, rgba(8, 40, 36, 0.97) 100%);
  border-color: rgba(45, 212, 191, 0.16);
}

.chatbot--open .chatbot__panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* 面板头部 — 青绿渐变 */
.chatbot__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(110, 231, 183, 0.12);
  background: linear-gradient(180deg, rgba(13, 148, 136, 0.12) 0%, transparent 100%);
  flex-shrink: 0;
}

.chatbot__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0d9488, #0f766e);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(13, 148, 136, 0.35);
}

.chatbot__header-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.chatbot__name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #ccfbf1;
  letter-spacing: 0.02em;
}

.chatbot__status {
  font-size: 0.7rem;
  color: rgba(153, 246, 228, 0.55);
  letter-spacing: 0.04em;
}

/* 消息区域 */
.chatbot__messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  scroll-behavior: smooth;
  background: transparent;
}

.chatbot__messages::-webkit-scrollbar {
  width: 4px;
}

.chatbot__messages::-webkit-scrollbar-track {
  background: transparent;
}

.chatbot__messages::-webkit-scrollbar-thumb {
  background: rgba(110, 231, 183, 0.15);
  border-radius: 4px;
}

.chatbot__message {
  display: flex;
  max-width: 85%;
  animation: chatbotFadeIn 0.35s ease;
}

@keyframes chatbotFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chatbot__message--bot {
  align-self: flex-start;
}

.chatbot__message--user {
  align-self: flex-end;
}

.chatbot__bubble {
  padding: 10px 14px;
  border-radius: 16px;
  font-size: 0.85rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  word-break: break-word;
  white-space: pre-wrap;
}

/* 机器人气泡 — 淡青绿调 */
.chatbot__message--bot .chatbot__bubble {
  background: rgba(110, 231, 183, 0.12);
  color: #ccfbf1;
  border-bottom-left-radius: 6px;
}

/* 用户气泡 — 深青绿调 */
.chatbot__message--user .chatbot__bubble {
  background: rgba(13, 148, 136, 0.55);
  color: #ffffff;
  border-bottom-right-radius: 6px;
}

/* 输入区域 */
.chatbot__input-area {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-top: 1px solid rgba(110, 231, 183, 0.1);
  flex-shrink: 0;
  background: rgba(110, 231, 183, 0.03);
}

.chatbot__input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid rgba(110, 231, 183, 0.2);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.06);
  color: #ccfbf1;
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}

.chatbot__input::placeholder {
  color: rgba(153, 246, 228, 0.35);
}

.chatbot__input:focus {
  border-color: rgba(110, 231, 183, 0.5);
  background: rgba(255, 255, 255, 0.1);
}

.chatbot__send {
  width: 38px;
  height: 38px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #0d9488, #0f766e);
  color: #ffffff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}

.chatbot__send:hover {
  background: linear-gradient(135deg, #14b8a6, #0d9488);
  transform: scale(1.05);
}

.chatbot__send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* 打字指示器 */
.chatbot__typing {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  border-radius: 16px;
  border-bottom-left-radius: 6px;
  background: rgba(110, 231, 183, 0.12);
  width: fit-content;
}

.chatbot__typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #99f6e4;
  animation: chatbotTyping 1.4s infinite ease-in-out both;
}

.chatbot__typing-dot:nth-child(1) { animation-delay: 0s; }
.chatbot__typing-dot:nth-child(2) { animation-delay: 0.2s; }
.chatbot__typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes chatbotTyping {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  30% {
    opacity: 1;
    transform: scale(1.15);
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .portfolio__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .toolkit__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .portfolio__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__title {
    letter-spacing: 0.04em;
  }
}

@media (max-width: 480px) {
  .portfolio__grid {
    grid-template-columns: 1fr;
    max-width: 300px;
    margin: 0 auto;
  }

  .toolkit__grid {
    grid-template-columns: 1fr;
    max-width: 320px;
    margin: 0 auto;
  }

  .hero__title {
    font-weight: 500;
  }

  .chatbot__panel {
    width: calc(100vw - 32px);
    right: 16px;
    height: 460px;
    bottom: 82px;
  }
}