:root {
    --bg: #0b0f1a;
    --card: rgba(255, 255, 255, 0.07);
    --border: rgba(255, 255, 255, 0.12);
    --text: #e6e6e6;
    --muted: #999;
    --accent: #8a6cff;
    --accent2: #5ce1ff;
    --glow: rgba(138, 108, 255, 0.35);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    text-align: center;
    min-height: 100dvh;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(138, 108, 255, 0.15), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(92, 225, 255, 0.12), transparent 40%);
    padding-bottom: 140px;
    overscroll-behavior: none;
}

h1 {
    font-size: 26px;
    font-weight: 700;
    margin-top: 36px;
    background: linear-gradient(120deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--muted);
    margin-bottom: 24px;
    font-size: 13px;
    letter-spacing: 0.5px;
    line-height: 1.8;
}

.carousel-wrapper {
    max-width: 480px;
    margin: 0 auto 24px;
    padding: 0 14px;
}

.carousel {
    position: relative;
    width: 100%;
    height: 180px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), 0 0 20px rgba(138, 108, 255, 0.15);
}

.carousel-track {
    display: flex;
    width: 400%;
    height: 100%;
    animation: slide 16s infinite;
}

.carousel-track img {
    width: 25%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
}

@keyframes slide {
    0% {
        transform: translateX(0);
    }
    20% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-25%);
    }
    45% {
        transform: translateX(-25%);
    }
    50% {
        transform: translateX(-50%);
    }
    70% {
        transform: translateX(-50%);
    }
    75% {
        transform: translateX(-75%);
    }
    95% {
        transform: translateX(-75%);
    }
    100% {
        transform: translateX(0);
    }
}

.intro-box {
    max-width: 480px;
    margin: 0 auto 20px;
    padding: 0 14px;
}

.intro-inner {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.intro-inner strong {
    background: linear-gradient(120deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 0 14px;
    max-width: 480px;
    margin: 0 auto;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

@supports (-webkit-touch-callout: none) {
    .card {
        -webkit-backdrop-filter: blur(14px);
        backdrop-filter: blur(14px);
    }
}

.step {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    box-shadow: 0 0 10px var(--glow);
    margin-bottom: 10px;
}

.card h3 {
    margin: 6px 0 12px;
    font-size: 17px;
    font-weight: 600;
}

.card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 10px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
}

.card h4 {
    color: var(--text);
}

textarea {
    width: 100%;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    padding: 10px;
    font-size: 13px;
    resize: none;
}

.title-box {
    height: 64px;
}

video {
    width: 100%;
    max-width: 320px;
    height: 180px;
    object-fit: cover;
    border-radius: 10px;
    margin: 12px auto 0;
    display: block;
    background: #000;
    box-shadow: 0 0 15px rgba(138, 108, 255, 0.2), 0 6px 18px rgba(0, 0, 0, 0.5);
}

button {
    margin-top: 12px;
    width: 100%;
    padding: 12px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 6px 20px var(--glow);
    cursor: pointer;
    transition: transform 0.15s;
}

button:active {
    transform: scale(0.97);
}

.hint {
    font-size: 12px;
    color: #4caf50;
    margin-top: 6px;
    height: 18px;
}

.reload-btn {
    margin: 20px auto 60px;
    display: block;
    width: calc(100% - 28px);
    max-width: 480px;
    font-size: 15px;
}

/* ===== 客服浮动按钮 ===== */
.cs-float-btn {
    position: fixed;
    right: 16px;
    bottom: calc(80px + env(safe-area-inset-bottom, 0px));
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 4px 20px var(--glow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10000;
    transition: transform 0.2s;
    overflow: hidden;
}

.cs-float-btn:active {
    transform: scale(0.9);
}

.cs-float-btn img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* ===== 客服弹窗 ===== */
.cs-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 10001;
    display: none;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

.cs-overlay.active {
    display: flex;
}

.cs-window {
    width: 100%;
    max-width: 420px;
    height: 65dvh;
    max-height: 600px;
    background: #12182a;
    border-radius: 24px 24px 0 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: csSlideUp 0.3s ease;
    -webkit-overflow-scrolling: touch;
}

@keyframes csSlideUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

.cs-header {
    padding: 16px;
    padding-top: max(16px, env(safe-area-inset-top, 0px));
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.cs-header-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.cs-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    overflow: hidden;
}

.cs-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.cs-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
}

.cs-status {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.8);
}

.cs-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #fff;
    cursor: pointer;
}

.cs-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    -webkit-overflow-scrolling: touch;
}

.cs-msg {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
}

.cs-msg.bot {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
}

.cs-msg.user {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #fff;
    border-bottom-right-radius: 4px;
    align-self: flex-end;
}

.cs-msg .link-preview {
    background: rgba(138, 108, 255, 0.15);
    border: 1px solid rgba(138, 108, 255, 0.3);
    border-radius: 8px;
    padding: 8px 10px;
    margin-top: 4px;
    font-size: 12px;
    color: var(--accent2);
    word-break: break-all;
}

.cs-msg-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.cs-msg-actions button {
    flex: 1;
    padding: 8px 10px;
    font-size: 12px;
    border-radius: 8px;
    border: 1px solid rgba(138, 108, 255, 0.4);
    background: rgba(138, 108, 255, 0.15);
    color: #fff;
    cursor: pointer;
    box-shadow: none;
    margin-top: 0;
    transition: background 0.2s;
    -webkit-appearance: none;
    appearance: none;
}

.cs-msg-actions button:active {
    background: rgba(138, 108, 255, 0.35);
}

.cs-typing {
    display: none;
    align-self: flex-start;
    background: rgba(255, 255, 255, 0.08);
    padding: 12px 16px;
    border-radius: 14px;
    border-bottom-left-radius: 4px;
    gap: 4px;
}

.cs-typing.active {
    display: flex;
}

.cs-typing span {
    width: 6px;
    height: 6px;
    background: var(--muted);
    border-radius: 50%;
    animation: typingBounce 1.2s infinite;
}

.cs-typing span:nth-child(2) {
    animation-delay: 0.2s;
}
.cs-typing span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {
    0%,
    60%,
    100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-6px);
    }
}

.cs-input-area {
    padding: 12px;
    padding-bottom: max(12px, env(safe-area-inset-bottom, 0px));
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

.cs-input-area input {
    flex: 1;
    padding: 10px 14px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 13px;
    outline: none;
    font-size: max(16px, 13px);
}

.cs-input-area input:focus {
    border-color: var(--accent);
}

.cs-toolbar {
    padding: 0 12px 12px;
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.cs-tool-btn {
    flex: 1;
    padding: 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: background 0.2s;
}

.cs-tool-btn:active {
    background: rgba(255, 255, 255, 0.12);
}

.cs-send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    border: none;
    color: #fff;
    font-size: 16px;
    transition: transform 0.15s;
}

.cs-send-btn:active {
    transform: scale(0.9);
}

.cs-file-input {
    display: none;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
    h1 {
        font-size: 34px;
    }
    .container {
        max-width: 1200px;
        flex-direction: row;
    }
    .card {
        flex: 1;
    }
    .carousel-wrapper {
        max-width: 1200px;
    }
    .carousel {
        height: 240px;
    }
    .intro-box {
        max-width: 1200px;
    }
    .cs-window {
        border-radius: 20px;
        margin-bottom: 40px;
        height: 65dvh;
    }
}