/* ------------------
        banner
   ------------------ */

.banner {
    width: 100%;
    height: 100dvh;
    min-height: 650px;
    max-height: 840px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
}

.banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 24, 48, 0.8), rgba(25, 37, 62, 0.6));
    z-index: 1;
}

.banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 80%, var(--A3CFEB), transparent 70%),
                radial-gradient(circle at 80% 20%, var(--ADFFF5), transparent 70%);
    opacity: 0.1;
    filter: blur(80px);
    z-index: 1;
    animation: float 15s ease-in-out infinite alternate;
}

.banner-content {
    position: relative;
    z-index: 2;
    color: var(--FFFFFF);
    text-align: left;
    font-weight: bold;
    padding: 0 6vw;
    width: 100%;
    animation: slideInLeft 1s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

/* 主標題 */
.banner-title {
    text-shadow: 5px 5px 8px rgba(0, 0, 0, 0.8);
    font-size: clamp(32px, 7vw, 72px);
    letter-spacing: clamp(1px, 0.3vw, 3px);
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--FFFFFF), var(--A3CFEB), var(--ADFFF5));
    background-size: 200% 200%;
    background-clip: text;
    animation: gradientShift 4s ease-in-out infinite;
    font-weight: 900;
    line-height: 1.2;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 副標題 */
.banner-subtitle {
    font-size: clamp(18px, 3.5vw, 36px);
    font-weight: 500;
    opacity: 0.95;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
    line-height: 1.4;
    max-width: 800px;
}

/* 按鈕 */
.banner-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 18px 40px;
    color: var(--0F1830);
    font-size: clamp(16px, 2vw, 18px);
    font-weight: 800;
    letter-spacing: 0.1em;
    text-decoration: none;
    border-radius: var(--radius-pill);
    background: radial-gradient(100% 100% at 30% 20%, var(--ADFFF5), var(--A3CFEB));
    box-shadow: var(--shadow-2), 0 0 30px rgba(163, 207, 235, 0.3);
    border: 1px solid rgba(255, 255, 255, .6);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* 左右橫線 */
.banner-btn .line {
    display: inline-block;
    width: 24px;
    height: 2px;
    background-color: var(--0F1830);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    vertical-align: middle;
    position: relative;
    z-index: 1;
}

.banner-btn .left {
    margin-right: 10px;
}

.banner-btn .right {
    margin-left: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* hover 效果 */
.banner-btn:hover {
    box-shadow: 0 25px 50px rgba(163, 207, 235, 0.5);
    color: var(--0F1830);
    background: linear-gradient(135deg, var(--A3CFEB), var(--ADFFF5));
}

.banner-btn:active {
    transform: translateY(-2px) scale(0.98);
}

/* ------------------
        title
   ------------------ */

.section-title {
    display: flex;
    flex-direction: column;
    position: relative;
    margin: 0 0 48px 0;
    width: 100%;
}

.section-title .en {
    font-size: clamp(14px, 1.8vw, 18px);
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--A3CFEB);
    text-transform: uppercase;
    opacity: 0.9;
    margin-bottom: 8px;
    position: relative;
}

.section-title .en::after {
    content: "";
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 2px;
    background: var(--A3CFEB);
    opacity: 0.5;
}

.section-title .zh {
    font-size: clamp(24px, 4vw, 42px);
    font-weight: 900;
    letter-spacing: 0.02em;
    color: var(--131334);
    position: relative;
    line-height: 1.3;
}

/* 裝飾線條 */
.section-title .zh::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -12px;
    width: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--A3CFEB), var(--ADFFF5));
    border-radius: 2px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 80px;
}



/* 對齊版本 */
.section-title.right {
    align-items: flex-end;
    text-align: right;
}

.section-title.right .en::after {
    right: auto;
    left: -20px;
}

.section-title.right .zh::after {
    right: 0;
    left: auto;
}

.section-title.center {
    align-items: center;
    text-align: center;
}

.section-title.center .en::after {
    display: none;
}

.section-title.center .zh::after {
    left: 50%;
    transform: translateX(-50%);
}

.section-title.left {
    align-items: flex-start;
    text-align: left;
}

/* 深色背景版本 */
.section-title.light .zh {
    color: var(--FFFFFF);
}

.section-title.light .en {
    color: var(--A3CFEB);
}

/* ------------------
        btn
   ------------------ */

.btn {
    background: radial-gradient(100% 100% at 30% 20%, var(--ADFFF5), var(--A3CFEB));
    border: 0;
    position: relative;
    overflow: hidden;
    padding: 16px 32px;
    color: var(--0F1830);
    text-decoration: none;
    box-shadow: var(--shadow-1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    align-items: center;
    display: inline-flex;
    gap: 12px;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.05em;
    cursor: pointer;
    width: fit-content;
    user-select: none;
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2);
    color: var(--0F1830);
    background: linear-gradient(135deg, var(--A3CFEB), var(--ADFFF5));
}


/* 右邊箭頭 */
.btn-after::after {
    content: "→";
    font-size: inherit;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
    margin-left: 4px;
}

.btn-after:hover::after {
    transform: translateX(6px);
}

/* 左邊箭頭 */
.btn-before::before {
    content: "←";
    font-size: inherit;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
    margin-right: 4px;
}

.btn-before:hover::before {
    transform: translateX(-6px);
}


/* ------------------
        grid
   ------------------ */

.grid1 {
    display: grid;
    gap: clamp(24px, 4vw, 48px);
    align-items: stretch;
    margin: 32px 0;
}

.grid2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: stretch;
    margin: 32px 0;
}

.grid3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(24px, 4vw, 40px);
    margin: 32px 0;
}

.grid4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: clamp(20px, 3vw, 32px);
    margin: 32px 0;
}

/* ------------------
        card
   ------------------ */

.card {
    position: relative;
    border-radius: var(--radius-xl);
    padding: clamp(24px, 4vw, 36px);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.08));
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(16px) saturate(130%);
    box-shadow: var(--shadow-1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: radial-gradient(100% 100% at 30% 20%, var(--ADFFF5), var(--A3CFEB));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.card::after {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 200px;
    height: 200px;
    background: radial-gradient(50% 50% at 50% 50%, var(--A3CFEB), transparent 70%);
    opacity: 0;
    filter: blur(60px);
    transition: opacity 0.4s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover::after {
    opacity: 0.1;
}

.card:hover {
    transform: translateY(-12px);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.12));
    box-shadow: var(--shadow-2);
    border-color: rgba(255, 255, 255, 0.25);
}

.card .head {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.card .icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-size: 24px;
    background: radial-gradient(100% 100% at 30% 20%, var(--ADFFF5), var(--A3CFEB));
    color: var(--0F1830);
    border: 1px solid rgba(255, 255, 255, .6);
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease;
}

.card:hover .icon {
    transform: scale(1.1) rotate(5deg);
}

.card .title {
    margin: 0;
    font-size: clamp(18px, 2.5vw, 24px);
    font-weight: 900;
    letter-spacing: 0.02em;
    color: var(--FFFFFF);
    line-height: 1.3;
}

.card .points {
    list-style: none;
    margin: 20px 0 0;
    padding: 0;
    display: grid;
    gap: 16px;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    flex: 1;
}

.card .points li {
    position: relative;
    padding-left: 32px;
    line-height: 1.7;
    transition: all 0.3s ease;
}

.card .points li:hover {
    color: var(--FFFFFF);
    transform: translateX(4px);
}

.card .points li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    transform: translateY(2px);
    font-size: 16px;
    font-weight: bold;
    color: var(--A3CFEB);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(163, 207, 235, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    border: 1px solid rgba(163, 207, 235, 0.3);
}


/* ------------------
        Expertise
   ------------------ */

.expertise {
    background: linear-gradient(145deg, var(--F5F7FB), var(--FFFFFF));
    border: 1px solid rgba(19, 19, 52, .2);
    border-radius: var(--radius-xl);
    padding: clamp(28px, 4vw, 36px);
    box-shadow: var(--shadow-1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}


.expertise:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2);
    border-color: rgba(163, 207, 235, .28);
}

.expertise .badge {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: radial-gradient(100% 100% at 30% 20%, var(--ADFFF5), var(--A3CFEB));
    color: var(--0F1830);
    font-weight: 800;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-1);
    border: 1px solid rgba(255, 255, 255, .6);
    transition: transform 0.3s ease;
}

.expertise:hover .badge {
    transform: scale(1.1) rotate(10deg);
}

.expertise .icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--A3CFEB), var(--ADFFF5));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--0F1830);
    box-shadow: var(--shadow-1);
    transition: all 0.4s ease;
    font-size: 32px;
}

.expertise:hover .icon {
    transform: scale(1.08) rotate(-3deg);
    box-shadow: var(--shadow-2);
}

.expertise h3 {
    font-size: clamp(18px, 2.5vw, 22px);
    font-weight: 800;
    color: var(--131334);
    margin: 0 0 16px 0;
    letter-spacing: 0.02em;
    line-height: 1.3;
}

.expertise p {
    color: var(--131334);
    line-height: 1.8;
    font-size: 15px;
    margin: 0;
    transition: color 0.3s ease;
}


/* ------------------
        RWD 響應式設計
   ------------------ */

/* 平板尺寸 */
@media (max-width: 1024px) {
    .banner-content {
        padding: 0 4vw;
    }
    
    .grid2 {
        grid-template-columns: 1fr;
        gap: clamp(16px, 3vw, 32px);
    }
    
    .grid3 {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .grid4 {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }
    
    .section-title {
        margin-bottom: 32px;
        text-align: center !important;
        align-items: center !important;
    }

    .section-title .zh::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* 手機橫向 */
@media (max-width: 768px) {
    .banner {
        min-height: 500px;
        max-height: 600px;
    }
    
    .banner-content {
        padding: 0 3vw;
        text-align: center;
    }
    
    .banner-title {
        margin-bottom: 16px;
    }
    
    .banner-subtitle {
        margin-bottom: 32px;
    }
    
    .banner-btn {
        padding: 16px 32px;
        gap: 12px;
    }
    
    .banner-btn .line {
        width: 20px;
    }
    
    .banner-btn:hover .line {
        width: 32px;
    }
    

    
    .section-title .en::after {
        display: none;
    }
    
    .grid3 {
        grid-template-columns: 1fr;
    }
    
    .grid4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .card .head {
        gap: 16px;
        margin-bottom: 20px;
    }
    
    .card .icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
    
    
    .expertise .icon {
        width: 64px;
        height: 64px;
        font-size: 28px;
        margin-bottom: 20px;
    }
    
    .expertise .badge {
        width: 36px;
        height: 36px;
        font-size: 13px;
        top: 20px;
        right: 20px;
    }
}

/* 手機直向 */
@media (max-width: 480px) {
    .banner {
        min-height: 400px;
        max-height: 500px;
    }
    
    .banner-content {
        padding: 0 4vw;
    }
    
    .banner-btn {
        padding: 14px 28px;
        font-size: 16px;
        gap: 10px;
    }
    
    .banner-btn .line {
        width: 18px;
        height: 2px;
    }
    
    .banner-btn:hover .line {
        width: 28px;
    }
    
    .btn {
        padding: 14px 24px;
        font-size: 14px;
        gap: 8px;
    }
    
    .grid4 {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 20px;
    }
    
    .card .head {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .card .icon {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
    
    .expertise {
        padding: 24px;
        text-align: center;
    }
    
    .expertise .icon {
        width: 60px;
        height: 60px;
        font-size: 26px;
        margin: 0 auto 16px;
    }
    
    .expertise .badge {
        width: 32px;
        height: 32px;
        font-size: 12px;
        top: 16px;
        right: 16px;
    }
}

/* 極小螢幕 */
@media (max-width: 360px) {
    .banner-content {
        padding: 0 3vw;
    }
    
    .banner-btn {
        padding: 12px 24px;
        font-size: 15px;
        width: 100%;
        max-width: 280px;
    }
    
    .grid1,
    .grid2,
    .grid3,
    .grid4 {
        gap: 16px;
        margin: 24px 0;
    }
    
    .card,
    .expertise {
        padding: 16px;
    }
    
    .section-title {
        margin-bottom: 24px;
    }
}