/* ==========================================================================
   mobile-upload.css — 耀西图床移动端优先 (Mobile-First) 高级 UI 设计系统
   ==========================================================================
   Version: 1.0.0-PROD-2026
   Role: 顶级全栈猫娘架构师 (Mobile Design System Specialist)
   Architecture: Liquid Glassmorphism & Micro-interactions
   ========================================================================== */

/* ── 1. 设计令牌与明暗双模系统 (Design Tokens & Color Modes) ── */
:root {
  /* 品牌紫系主色调 (Brand Identity) */
  --m-primary: #6c5ce7;
  --m-primary-hover: #5a4bd4;
  --m-primary-active: #4d3fc0;
  --m-primary-light: #a29bfe;
  --m-primary-glow: rgba(108, 92, 231, 0.28);
  --m-primary-gradient: linear-gradient(135deg, #6c5ce7 0%, #8c7ae6 50%, #a29bfe 100%);
  --m-primary-glow-gradient: linear-gradient(135deg, rgba(108, 92, 231, 0.4) 0%, rgba(162, 155, 254, 0.2) 100%);

  /* 基础光感与色彩系统 (Light Mode - 高透高亮晨曦流光) */
  --m-bg: #f4f6fb;
  --m-bg-gradient: linear-gradient(175deg, #f8faff 0%, #f0f2fa 100%);
  --m-surface: rgba(255, 255, 255, 0.72);
  --m-surface-raised: rgba(255, 255, 255, 0.88);
  --m-surface-solid: #ffffff;
  --m-card: rgba(255, 255, 255, 0.75);
  --m-card-raised: rgba(255, 255, 255, 0.92);
  --m-card-glass: rgba(255, 255, 255, 0.65);
  --m-overlay-bg: rgba(15, 23, 42, 0.45);

  /* 文字层次系统 */
  --m-text: #12182b;
  --m-text-secondary: #475467;
  --m-text-muted: #64748b;
  --m-text-light: #94a3b8;
  --m-text-inverse: #ffffff;

  /* 边框与微光反射 (Specular Reflection) */
  --m-border: rgba(255, 255, 255, 0.55);
  --m-border-subtle: rgba(15, 23, 42, 0.08);
  --m-border-focus: #6c5ce7;
  --m-border-glass: rgba(255, 255, 255, 0.65);

  /* 状态色彩系统 */
  --m-success: #10b981;
  --m-success-bg: rgba(16, 185, 129, 0.12);
  --m-success-border: rgba(16, 185, 129, 0.28);
  --m-success-glow: rgba(16, 185, 129, 0.35);

  --m-warning: #f59e0b;
  --m-warning-bg: rgba(245, 158, 11, 0.12);
  --m-warning-border: rgba(245, 158, 11, 0.28);

  --m-danger: #ef4444;
  --m-danger-bg: rgba(239, 68, 68, 0.12);
  --m-danger-border: rgba(239, 68, 68, 0.28);
  --m-danger-glow: rgba(239, 68, 68, 0.35);

  /* 阴影层次系统 (Airy Soft Shadows) */
  --m-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --m-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);
  --m-shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12), 0 4px 12px rgba(15, 23, 42, 0.06);
  --m-shadow-capsule: 0 10px 30px rgba(108, 92, 231, 0.25), 0 4px 12px rgba(15, 23, 42, 0.08);
  --m-shadow-sheet: 0 -12px 48px rgba(15, 23, 42, 0.15), 0 -2px 10px rgba(15, 23, 42, 0.06);
  --m-shadow-glow: 0 0 24px var(--m-primary-glow);

  /* 磨砂玻璃滤镜 */
  --m-glass-blur: blur(24px);
  --m-glass-blur-sheet: blur(32px);
  --m-glass-saturate: saturate(180%);

  /* 黄金圆角体系 (Border Radii) */
  --m-radius-xs: 6px;
  --m-radius-sm: 10px;
  --m-radius-md: 16px;
  --m-radius-lg: 20px;
  --m-radius-xl: 26px;
  --m-radius-sheet: 28px;
  --m-radius-pill: 9999px;

  /* 移动端触控标准尺寸 (Thumb Hotspot Specs) */
  --m-touch-min: 48px;
  --m-touch-target: 48px;
  --m-touch-target-lg: 54px;
  --m-touch-target-sm: 44px;

  /* 安全区与动态视口参数 (Safe Areas & Dynamic Viewport) */
  --m-safe-top: env(safe-area-inset-top, 0px);
  --m-safe-bottom: env(safe-area-inset-bottom, 0px);
  --m-safe-left: env(safe-area-inset-left, 0px);
  --m-safe-right: env(safe-area-inset-right, 0px);

  /* 物理弹簧动效贝塞尔曲线 (Spring Physics) */
  --m-ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --m-ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --m-ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --m-duration-fast: 0.18s;
  --m-duration-normal: 0.28s;
  --m-duration-slow: 0.42s;
}

/* ── 2. 深色模式 (Dark Mode - 深邃星空暗黑质感) ── */
@media (prefers-color-scheme: dark) {
  :root {
    --m-primary: #7c6df7;
    --m-primary-hover: #8f82f9;
    --m-primary-active: #6655eb;
    --m-primary-light: #b0aaff;
    --m-primary-glow: rgba(124, 109, 247, 0.35);
    --m-primary-gradient: linear-gradient(135deg, #7c6df7 0%, #9485fa 50%, #b0aaff 100%);
    --m-primary-glow-gradient: linear-gradient(135deg, rgba(124, 109, 247, 0.5) 0%, rgba(176, 170, 255, 0.25) 100%);

    --m-bg: #0d1117;
    --m-bg-gradient: linear-gradient(175deg, #0f141f 0%, #090c10 100%);
    --m-surface: rgba(22, 28, 44, 0.72);
    --m-surface-raised: rgba(27, 34, 54, 0.92);
    --m-surface-solid: #161c2c;
    --m-card: rgba(22, 28, 44, 0.76);
    --m-card-raised: rgba(30, 38, 60, 0.94);
    --m-card-glass: rgba(20, 26, 42, 0.68);
    --m-overlay-bg: rgba(0, 0, 0, 0.72);

    --m-text: #f0f3fa;
    --m-text-secondary: #c0c7d6;
    --m-text-muted: #8b95aa;
    --m-text-light: #5f687a;
    --m-text-inverse: #0d1117;

    --m-border: rgba(255, 255, 255, 0.10);
    --m-border-subtle: rgba(255, 255, 255, 0.08);
    --m-border-focus: #7c6df7;
    --m-border-glass: rgba(255, 255, 255, 0.14);

    --m-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --m-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.25);
    --m-shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.60), 0 4px 12px rgba(0, 0, 0, 0.35);
    --m-shadow-capsule: 0 10px 32px rgba(0, 0, 0, 0.7), 0 0 20px rgba(124, 109, 247, 0.32);
    --m-shadow-sheet: 0 -16px 48px rgba(0, 0, 0, 0.75), 0 -2px 12px rgba(0, 0, 0, 0.45);

    --m-glass-blur: blur(28px);
    --m-glass-blur-sheet: blur(36px);
    --m-glass-saturate: saturate(200%);
  }
}

/* 手动明暗覆盖支持 ([data-theme="dark"] / [data-theme="light"]) */
[data-theme="dark"], .dark-theme {
  --m-primary: #7c6df7;
  --m-primary-hover: #8f82f9;
  --m-primary-active: #6655eb;
  --m-primary-light: #b0aaff;
  --m-primary-glow: rgba(124, 109, 247, 0.35);
  --m-primary-gradient: linear-gradient(135deg, #7c6df7 0%, #9485fa 50%, #b0aaff 100%);
  --m-primary-glow-gradient: linear-gradient(135deg, rgba(124, 109, 247, 0.5) 0%, rgba(176, 170, 255, 0.25) 100%);

  --m-bg: #0d1117;
  --m-bg-gradient: linear-gradient(175deg, #0f141f 0%, #090c10 100%);
  --m-surface: rgba(22, 28, 44, 0.72);
  --m-surface-raised: rgba(27, 34, 54, 0.92);
  --m-surface-solid: #161c2c;
  --m-card: rgba(22, 28, 44, 0.76);
  --m-card-raised: rgba(30, 38, 60, 0.94);
  --m-card-glass: rgba(20, 26, 42, 0.68);
  --m-overlay-bg: rgba(0, 0, 0, 0.72);

  --m-text: #f0f3fa;
  --m-text-secondary: #c0c7d6;
  --m-text-muted: #8b95aa;
  --m-text-light: #5f687a;
  --m-text-inverse: #0d1117;

  --m-border: rgba(255, 255, 255, 0.10);
  --m-border-subtle: rgba(255, 255, 255, 0.08);
  --m-border-focus: #7c6df7;
  --m-border-glass: rgba(255, 255, 255, 0.14);

  --m-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --m-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  --m-shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.60);
  --m-shadow-capsule: 0 10px 32px rgba(0, 0, 0, 0.7), 0 0 20px rgba(124, 109, 247, 0.32);
  --m-shadow-sheet: 0 -16px 48px rgba(0, 0, 0, 0.75);
}

[data-theme="light"], .light-theme {
  --m-primary: #6c5ce7;
  --m-primary-hover: #5a4bd4;
  --m-primary-active: #4d3fc0;
  --m-primary-light: #a29bfe;
  --m-primary-glow: rgba(108, 92, 231, 0.28);
  --m-primary-gradient: linear-gradient(135deg, #6c5ce7 0%, #8c7ae6 50%, #a29bfe 100%);
  --m-primary-glow-gradient: linear-gradient(135deg, rgba(108, 92, 231, 0.4) 0%, rgba(162, 155, 254, 0.2) 100%);

  --m-bg: #f4f6fb;
  --m-bg-gradient: linear-gradient(175deg, #f8faff 0%, #f0f2fa 100%);
  --m-surface: rgba(255, 255, 255, 0.72);
  --m-surface-raised: rgba(255, 255, 255, 0.88);
  --m-surface-solid: #ffffff;
  --m-card: rgba(255, 255, 255, 0.75);
  --m-card-raised: rgba(255, 255, 255, 0.92);
  --m-card-glass: rgba(255, 255, 255, 0.65);
  --m-overlay-bg: rgba(15, 23, 42, 0.45);

  --m-text: #12182b;
  --m-text-secondary: #475467;
  --m-text-muted: #64748b;
  --m-text-light: #94a3b8;
  --m-text-inverse: #ffffff;

  --m-border: rgba(255, 255, 255, 0.55);
  --m-border-subtle: rgba(15, 23, 42, 0.08);
  --m-border-focus: #6c5ce7;
  --m-border-glass: rgba(255, 255, 255, 0.65);

  --m-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --m-shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --m-shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.12);
  --m-shadow-capsule: 0 10px 30px rgba(108, 92, 231, 0.25);
  --m-shadow-sheet: 0 -12px 48px rgba(15, 23, 42, 0.15);
}

/* ── 3. 基础作用域隔离与触控微动效 (Base Scoping & Micro-interactions) ── */
[class^="m-"], [class*=" m-"] {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* 屏幕阅读器辅助 */
.m-sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* 移动端黄金触控目标通用规范 (>= 48px Touch Hotspot) */
.m-touch-target,
.m-btn,
.m-input,
.m-select,
.m-tab,
.m-icon-btn,
.m-chip-btn {
  min-height: var(--m-touch-min);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

/* 触控反馈通用类：缩放微反弹与弹性过渡 */
.m-clickable {
  cursor: pointer;
  transition: transform var(--m-duration-fast) var(--m-ease-spring),
              opacity var(--m-duration-fast) ease,
              background var(--m-duration-normal) ease,
              box-shadow var(--m-duration-normal) ease,
              border-color var(--m-duration-normal) ease;
}

.m-clickable:active {
  transform: scale(0.97);
}

/* ── 4. 浮动操作胶囊 (Floating Action Capsule / Bar) ── */
.m-action-capsule {
  position: fixed;
  bottom: calc(16px + var(--m-safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 990;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--m-radius-pill);
  background: var(--m-surface-raised);
  backdrop-filter: var(--m-glass-blur) var(--m-glass-saturate);
  -webkit-backdrop-filter: var(--m-glass-blur) var(--m-glass-saturate);
  border: 1px solid var(--m-border-glass);
  box-shadow: var(--m-shadow-capsule);
  transition: transform var(--m-duration-normal) var(--m-ease-spring),
              box-shadow var(--m-duration-normal) ease,
              opacity var(--m-duration-normal) ease;
  max-width: calc(100vw - 32px);
  will-change: transform;
}

/* 胶囊脉冲呼吸光晕环 */
.m-action-capsule::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: var(--m-primary-glow-gradient);
  z-index: -1;
  opacity: 0.6;
  filter: blur(10px);
  animation: m-pulse-glow 3s infinite ease-in-out;
  pointer-events: none;
}

.m-action-capsule:active {
  transform: translateX(-50%) scale(0.98);
}

/* 胶囊内用户身份头像/状态 */
.m-capsule-auth {
  display: flex;
  align-items: center;
  gap: 8px;
  height: var(--m-touch-min);
  padding: 0 12px;
  border-radius: var(--m-radius-pill);
  background: var(--m-card-glass);
  border: 1px solid var(--m-border-subtle);
  color: var(--m-text);
  font-size: clamp(0.78rem, 0.75rem + 0.2vw, 0.88rem);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-capsule-auth:active {
  transform: scale(0.96);
  background: var(--m-surface);
}

.m-capsule-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--m-radius-pill);
  background: var(--m-primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  overflow: hidden;
  box-shadow: 0 2px 6px var(--m-primary-glow);
  flex-shrink: 0;
}

.m-capsule-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.m-capsule-user-name {
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 核心上传触发主按钮 (Floating Main Action Pill) */
.m-capsule-trigger {
  min-height: var(--m-touch-min);
  padding: 0 20px;
  border-radius: var(--m-radius-pill);
  background: var(--m-primary-gradient);
  color: #ffffff;
  border: none;
  font-size: clamp(0.88rem, 0.85rem + 0.2vw, 0.98rem);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 4px 16px var(--m-primary-glow);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--m-duration-fast) var(--m-ease-spring),
              box-shadow var(--m-duration-fast) ease;
}

.m-capsule-trigger:active {
  transform: scale(0.96);
  box-shadow: 0 2px 8px var(--m-primary-glow);
}

/* 动态流动光泽 */
.m-capsule-trigger::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  animation: m-shimmer 4s infinite linear;
}

.m-capsule-icon {
  font-size: 18px;
  line-height: 1;
  display: inline-block;
  transition: transform var(--m-duration-fast) var(--m-ease-spring);
}

.m-capsule-trigger:hover .m-capsule-icon {
  transform: rotate(90deg);
}

/* 胶囊辅助徽章或分类切换指示 */
.m-capsule-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--m-touch-min);
  padding: 0 12px;
  border-radius: var(--m-radius-pill);
  background: var(--m-card-glass);
  border: 1px solid var(--m-border-subtle);
  color: var(--m-text-secondary);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-capsule-badge:active {
  transform: scale(0.96);
  color: var(--m-primary);
}

/* ── 5. 移动端抽屉式浮层 (Mobile Bottom Sheet) ── */
.m-sheet-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--m-overlay-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--m-duration-normal) var(--m-ease-smooth),
              visibility var(--m-duration-normal);
}

.m-sheet-overlay.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.m-bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1001;
  max-height: min(92dvh, calc(100vh - 40px));
  background: var(--m-surface-raised);
  backdrop-filter: var(--m-glass-blur-sheet) var(--m-glass-saturate);
  -webkit-backdrop-filter: var(--m-glass-blur-sheet) var(--m-glass-saturate);
  border-top-left-radius: var(--m-radius-sheet);
  border-top-right-radius: var(--m-radius-sheet);
  border-top: 1px solid var(--m-border-glass);
  box-shadow: var(--m-shadow-sheet);
  display: flex;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--m-duration-slow) var(--m-ease-spring);
  padding-bottom: calc(16px + var(--m-safe-bottom));
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  will-change: transform;
}

.m-sheet-overlay.is-active .m-bottom-sheet {
  transform: translateY(0);
}

/* 顶部拖拽手势手柄 (Drag Handle) */
.m-sheet-handle-bar {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0 6px;
  cursor: grab;
  touch-action: none;
}

.m-sheet-handle {
  width: 44px;
  height: 5px;
  border-radius: var(--m-radius-pill);
  background: var(--m-text-light);
  opacity: 0.45;
  transition: opacity var(--m-duration-fast) ease, width var(--m-duration-fast) ease;
}

.m-sheet-handle-bar:active .m-sheet-handle {
  opacity: 0.8;
  width: 52px;
}

/* 抽屉头部 (Sheet Header) */
.m-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px clamp(16px, 4vw, 24px) 14px;
  border-bottom: 1px solid var(--m-border-subtle);
  flex-shrink: 0;
}

.m-sheet-title-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.m-sheet-title {
  font-size: clamp(1.15rem, 1.05rem + 0.4vw, 1.35rem);
  font-weight: 700;
  color: var(--m-text);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.m-sheet-title-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--m-radius-pill);
  background: var(--m-primary-glow);
  color: var(--m-primary);
  border: 1px solid rgba(108, 92, 231, 0.2);
}

.m-sheet-subtitle {
  font-size: 12px;
  color: var(--m-text-muted);
}

/* 关闭按钮 (Touch Target >= 48px) */
.m-sheet-close {
  width: var(--m-touch-min);
  height: var(--m-touch-min);
  border-radius: var(--m-radius-pill);
  background: var(--m-card-glass);
  border: 1px solid var(--m-border-subtle);
  color: var(--m-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-sheet-close:active {
  transform: scale(0.92);
  background: var(--m-danger-bg);
  color: var(--m-danger);
  border-color: var(--m-danger-border);
}

/* 抽屉可滚动内容主体 */
.m-sheet-body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 16px clamp(16px, 4vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* 细致滚动条美化 */
.m-sheet-body::-webkit-scrollbar {
  width: 5px;
}
.m-sheet-body::-webkit-scrollbar-thumb {
  background: var(--m-text-light);
  border-radius: var(--m-radius-pill);
  opacity: 0.3;
}

/* ── 6. 上传通道与分类选择系统 (Channels & Category Controls) ── */
.m-segmented-control {
  display: flex;
  background: var(--m-card-glass);
  padding: 4px;
  border-radius: var(--m-radius-lg);
  border: 1px solid var(--m-border-subtle);
  position: relative;
  gap: 4px;
}

.m-segment-tab {
  flex: 1;
  min-height: var(--m-touch-min);
  border-radius: var(--m-radius-md);
  background: transparent;
  border: none;
  color: var(--m-text-secondary);
  font-size: clamp(0.85rem, 0.8rem + 0.2vw, 0.95rem);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
  position: relative;
  z-index: 1;
}

.m-segment-tab.is-active {
  background: var(--m-surface-solid);
  color: var(--m-primary);
  box-shadow: var(--m-shadow-sm);
}

.m-segment-tab:active {
  transform: scale(0.97);
}

/* 分类标签横向滑动选择器 (Swipeable Category Scroller) */
.m-category-scroller {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.m-category-scroller::-webkit-scrollbar {
  display: none;
}

.m-chip-btn {
  min-height: var(--m-touch-min);
  padding: 0 16px;
  border-radius: var(--m-radius-pill);
  background: var(--m-card-glass);
  border: 1px solid var(--m-border-subtle);
  color: var(--m-text-secondary);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  scroll-snap-align: start;
  gap: 6px;
  cursor: pointer;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-chip-btn.is-active {
  background: var(--m-primary-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px var(--m-primary-glow);
}

.m-chip-btn:active {
  transform: scale(0.96);
}

/* ── 7. 磨砂玻璃拖拽与选取区 (Liquid Glass Dropzone) ── */
.m-dropzone {
  position: relative;
  border: 2px dashed var(--m-border-glass);
  border-radius: var(--m-radius-xl);
  background: var(--m-card-glass);
  padding: clamp(24px, 5vw, 36px) clamp(16px, 4vw, 24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  overflow: hidden;
  transition: all var(--m-duration-normal) var(--m-ease-spring);
}

.m-dropzone:hover, .m-dropzone.is-dragover {
  border-color: var(--m-primary);
  background: var(--m-surface);
  box-shadow: 0 0 24px var(--m-primary-glow);
  transform: scale(1.01);
}

.m-dropzone:active {
  transform: scale(0.99);
}

.m-dropzone-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--m-radius-pill);
  background: var(--m-primary-glow);
  border: 1px solid rgba(108, 92, 231, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--m-primary);
  margin-bottom: 12px;
  animation: m-float 3s ease-in-out infinite;
}

.m-dropzone-title {
  font-size: clamp(0.98rem, 0.92rem + 0.3vw, 1.1rem);
  font-weight: 600;
  color: var(--m-text);
  margin-bottom: 4px;
}

.m-dropzone-desc {
  font-size: 12px;
  color: var(--m-text-muted);
  max-width: 280px;
  line-height: 1.5;
}

.m-dropzone-tags {
  margin-top: 10px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

.m-dropzone-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: var(--m-radius-xs);
  background: var(--m-card-raised);
  color: var(--m-text-secondary);
  border: 1px solid var(--m-border-subtle);
}

/* 隐藏原生文件上传输入控件，覆盖整个区域便于点按 */
.m-file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
}

/* ── 8. 文件预览卡片 (File Preview Card) ── */
.m-preview-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--m-radius-lg);
  background: var(--m-card-raised);
  border: 1px solid var(--m-border-subtle);
  box-shadow: var(--m-shadow-sm);
  position: relative;
}

.m-preview-thumb {
  width: 52px;
  height: 52px;
  border-radius: var(--m-radius-md);
  object-fit: cover;
  background: var(--m-surface);
  border: 1px solid var(--m-border-subtle);
  flex-shrink: 0;
}

.m-preview-info {
  flex: 1;
  min-width: 0;
}

.m-preview-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--m-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.m-preview-meta {
  font-size: 12px;
  color: var(--m-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 2px;
}

.m-preview-remove {
  width: var(--m-touch-min);
  height: var(--m-touch-min);
  border-radius: var(--m-radius-pill);
  background: transparent;
  border: none;
  color: var(--m-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-preview-remove:active {
  transform: scale(0.92);
  color: var(--m-danger);
  background: var(--m-danger-bg);
}

/* ── 9. 上传进度条与脉冲光晕动效 (Liquid Progress & Pulse Glow) ── */
.m-progress-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.m-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
}

.m-progress-stage {
  color: var(--m-text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.m-progress-percent {
  color: var(--m-primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.m-progress-track {
  width: 100%;
  height: 8px;
  background: var(--m-card-glass);
  border-radius: var(--m-radius-pill);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--m-border-subtle);
}

.m-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--m-primary-gradient);
  border-radius: var(--m-radius-pill);
  position: relative;
  transition: width 0.25s ease-out;
  box-shadow: 0 0 12px var(--m-primary-glow);
}

/* 进度条流动流光 */
.m-progress-fill::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.4) 50%,
    transparent 100%
  );
  animation: m-shimmer 1.8s infinite linear;
}

/* 进度条前端脉冲微光点 */
.m-progress-fill::before {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: var(--m-radius-pill);
  background: #ffffff;
  box-shadow: 0 0 8px #ffffff, 0 0 16px var(--m-primary);
}

/* ── 10. 上传结果与格式复制矩阵 (Result Card & Copy Matrix) ── */
.m-result-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
  border-radius: var(--m-radius-xl);
  background: var(--m-card-raised);
  border: 1px solid var(--m-success-border);
  box-shadow: var(--m-shadow-md);
  position: relative;
  overflow: hidden;
}

.m-result-banner {
  display: flex;
  align-items: center;
  gap: 12px;
}

.m-success-bounce {
  width: 44px;
  height: 44px;
  border-radius: var(--m-radius-pill);
  background: var(--m-success-bg);
  border: 1px solid var(--m-success-border);
  color: var(--m-success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 0 16px var(--m-success-glow);
  animation: m-success-bounce 0.7s var(--m-ease-bounce) forwards;
  flex-shrink: 0;
}

.m-result-headline {
  flex: 1;
}

.m-result-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--m-text);
}

.m-result-subtitle {
  font-size: 12px;
  color: var(--m-text-muted);
}

/* 链接快速复制行 (Link Copy Items) */
.m-copy-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.m-copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--m-card-glass);
  border: 1px solid var(--m-border-subtle);
  border-radius: var(--m-radius-md);
  padding: 4px 6px 4px 12px;
}

.m-copy-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--m-primary);
  width: 42px;
  flex-shrink: 0;
}

.m-copy-input {
  flex: 1;
  background: transparent;
  border: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12px;
  color: var(--m-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  outline: none;
  padding: 8px 0;
}

.m-copy-btn {
  min-height: calc(var(--m-touch-min) - 8px);
  padding: 0 14px;
  border-radius: var(--m-radius-sm);
  background: var(--m-surface-solid);
  border: 1px solid var(--m-border-subtle);
  color: var(--m-text);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-copy-btn:active {
  transform: scale(0.95);
  background: var(--m-primary-glow);
  color: var(--m-primary);
}

.m-copy-btn.is-copied {
  background: var(--m-success-bg);
  color: var(--m-success);
  border-color: var(--m-success-border);
}

/* ── 11. 交互按钮与操作底栏 (Action Buttons & Footer Bar) ── */
.m-btn {
  border-radius: var(--m-radius-pill);
  font-weight: 600;
  font-size: clamp(0.92rem, 0.88rem + 0.2vw, 1.02rem);
  padding: 0 24px;
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--m-duration-fast) var(--m-ease-spring);
}

.m-btn-primary {
  background: var(--m-primary-gradient);
  color: #ffffff;
  box-shadow: 0 4px 16px var(--m-primary-glow);
}

.m-btn-primary:active {
  transform: scale(0.97);
  box-shadow: 0 2px 8px var(--m-primary-glow);
}

.m-btn-secondary {
  background: var(--m-card-glass);
  color: var(--m-text);
  border: 1px solid var(--m-border-subtle);
}

.m-btn-secondary:active {
  transform: scale(0.97);
  background: var(--m-surface);
}

.m-btn-block {
  width: 100%;
}

.m-btn[disabled] {
  opacity: 0.55;
  pointer-events: none;
  filter: grayscale(0.5);
}

/* 抽屉底部固定操作栏 */
.m-sheet-footer {
  padding: 12px clamp(16px, 4vw, 24px) 0;
  border-top: 1px solid var(--m-border-subtle);
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

/* ── 12. 移动端浮动提示与通知 (Toasts & Notifications) ── */
.m-toast-container {
  position: fixed;
  top: calc(20px + var(--m-safe-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  width: min(calc(100vw - 32px), 420px);
}

.m-toast, .mf-toast-item {
  padding: 12px 18px;
  border-radius: var(--m-radius-pill);
  background: var(--m-surface-raised);
  backdrop-filter: var(--m-glass-blur) var(--m-glass-saturate);
  -webkit-backdrop-filter: var(--m-glass-blur) var(--m-glass-saturate);
  border: 1px solid var(--m-border-glass);
  box-shadow: var(--m-shadow-lg);
  color: var(--m-text);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: m-toast-in 0.35s var(--m-ease-spring) forwards;
}

.m-toast.is-leaving, .mf-toast-item.mf-hide {
  animation: m-toast-out 0.25s var(--m-ease-smooth) forwards;
}

.m-toast-icon, .mf-toast-icon {
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.m-toast-success .m-toast-icon, .mf-toast-success .mf-toast-icon {
  color: var(--m-success);
}

.m-toast-error .m-toast-icon, .mf-toast-error .mf-toast-icon {
  color: var(--m-danger);
}

.m-toast-warning .m-toast-icon, .mf-toast-warning .mf-toast-icon {
  color: var(--m-warning);
}

.m-toast-info .m-toast-icon, .mf-toast-info .mf-toast-icon {
  color: var(--m-primary);
}

/* ── 13. 动画关键帧全集 (Animation Keyframes Suite) ── */
@keyframes m-pulse-glow {
  0%, 100% {
    opacity: 0.5;
    transform: scale(0.98);
  }
  50% {
    opacity: 0.85;
    transform: scale(1.02);
  }
}

@keyframes m-shimmer {
  0% {
    transform: translateX(-100%) skewX(-20deg);
  }
  100% {
    transform: translateX(200%) skewX(-20deg);
  }
}

@keyframes m-float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@keyframes m-success-bounce {
  0% {
    transform: scale(0) rotate(-45deg);
    opacity: 0;
  }
  60% {
    transform: scale(1.2) rotate(10deg);
  }
  100% {
    transform: scale(1) rotate(0);
    opacity: 1;
  }
}

@keyframes m-toast-in {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes m-toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-20px) scale(0.9);
  }
}

@keyframes m-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.m-spin {
  animation: m-spin 1s linear infinite;
  display: inline-block;
}

/* ── 14. 响应式与跨端微调 (Responsive & Ergonomic Polish) ── */
@media (min-width: 640px) {
  /* 平板及大屏下将底部抽屉优雅居中为居中卡片弹窗 (Dialog Center Floating) */
  .m-bottom-sheet {
    bottom: auto;
    top: 50%;
    left: 50%;
    right: auto;
    width: min(540px, calc(100vw - 48px));
    transform: translate(-50%, -46%) scale(0.95);
    border-radius: var(--m-radius-sheet);
    border: 1px solid var(--m-border-glass);
    padding-bottom: 24px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
  }

  .m-sheet-overlay.is-active .m-bottom-sheet {
    transform: translate(-50%, -50%) scale(1);
  }

  .m-sheet-handle-bar {
    display: none;
  }
}

/* 针对小屏（iPhone SE 等 < 360px）适配 */
@media (max-width: 360px) {
  .m-action-capsule {
    padding: 4px 6px;
    gap: 6px;
  }
  .m-capsule-trigger {
    padding: 0 14px;
    font-size: 13px;
  }
  .m-capsule-auth {
    padding: 0 8px;
  }
  .m-capsule-user-name {
    display: none;
  }
}